2025-06-05T04:06:14Zhttp://www.bdim.eu/oai/
oai:bdim.eu:RLIN_2001_9_12_3_185_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2001_9_12_3_185_0 Alcuni commenti su di un lavoro di Gaetano Fichera Some comments on a Gaetano Fichera paper Manacorda Tristano 2001 9 12 RLIN_2001_9_12 9 3 RLIN_2001_9_12_3 185 189 1898459 1170.80315 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Una idea di G. Fichera ed un risultato di W. A. Day vengono usati per provare che il calore, nella teoria di Fourier, simula una propagazione di tipo ondoso.

Based on a fundamental remark by G. Fichera and on a result obtained by W. A. Day, it is proved here that heath propagates apparently as a wave.

Heath Propagation Fourier Theory G. Fichera provider bdim
1175584 0756.35035 10.1007/BF02844459 Fichera, G., Is the Fourier theory of heat propagation paradoxical? Rend. Circ. Mat. Palermo, 41, 1992, 1-28. 01.0379.01 Maxwell, J.C., On the dynamic theory of gases. Phil. Trans. Roy. Soc. London A, 157, 1867, 49-88. Stefan, I., Über die Fortpflanzung der Wärme. Sitz. Ar. Wiss. Wien, 47, 2, 1863, 326-344. 32898 0035.26203 Cattaneo, C., Sulla conduzione del calore. Atti Sem. Mat. Fis. Univ. Modena, 3, 1948, 83-101. 977943 1129.80300 10.1103/RevModPhys.61.41 Joseph, D.D. - Preziosi, L., Heat Waves. Rev. of Mod. Physics, 61, 1989, 41-73. 1433756 0886.35068 Day, W.A., On rates of propagation of heat according to Fourier’s theory. Q. Appl. Math., 55, 1997, 127-138. 1466149 0979.35505 Day, W.A., A note on the propagation of temperature disturbances. Q. Appl. Math., 55, 1997, 565-572. 1672179 1028.35088 Day, W.A. - Saccomandi, G., On rates of propagation of heat according to Fourier’s theory. Q. Appl. Math., 57, 1999, 87-91. Manacorda, T., Una osservazione sulla propagazione del calore nella teoria di Fourier. Quad. IMA, 1998. 0001.00501 Courant, R. - Hilbert, D., Metoden der matematischen Physik. Verlag, Berlin 1931. 666429 0501.73008 10.1007/BF00250739 Coleman, B.D. - Fabrizio, M. - Owen, D.R., On the Thermodynamics of Second Sound in Dieletric Crystals. ARMA, 80, 1982, 135-158. 0514.73001 Manacorda, T., Teoria macroscopica della radiazione interna nei continui. Riv. Mat. Univ. Parma, (4) 8, 1982, 483-494. 866553 0625.73007 Manacorda, T., A note on Internal Radiation in Solids. Boll. UMI, (6) 5A, 1986, 431-434. 775366 0582.73004 10.1007/BF00250907 Dunn, J.E. - Serrin, J., On the Thermodynamics of Interstitial Working. ARMA, 88, 1985, 95-133.
oai:bdim.eu:RLIN_1990_9_1_2_85_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1990_9_1_2_85_0 Alcune condizioni sul prodotto di due elementi in un semigruppo. Some conditions on the product of two elements of a semigroup Justin Jacques Pirillo Giuseppe Varricchio Stefano 1990 5 1 RLIN_1990_9_1 9 2 RLIN_1990_9_1_2 85 87 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Sia S un semigruppo finitamente generato. Se per ogni coppia x,y di elementi di S si ha che xy oppure yx è un idempotente allora S è finito.

Some conditions on the product of two elements of a semigroup. Let S be a finitely generated semigroup. If for each pair x, y of elements of S one has that xy or yx is an idempotent then S is finite.

Semigroup Idempotent Ideal provider bdim
46353 0046.01903 GREEN, J. A. - REES, D., On semigroups in which \( x^{r} = x \) x r = x . Math. Proc. Cambridge Phil. Soc, 48, 1952, 35-40. 549935 0421.20032 10.1016/0021-8693(79)90088-7 HOTZEL, E., On finiteness conditions in semigroups. Journal of Algebra, 60, 1979, 352-370. 1014222 0681.20039 10.1007/BF02573248 JUSTIN, J. - PIRILLO, G., Infinite words and permutation properties. Semigroup Forum, in corso di stampa. 0683.20046 JUSTIN, J. - PIRILLO, G., Mots sans carré et permutabilité des semi-groups. C. R. Acad. Sci. Paris, in corso di stampa. 675953 0514.20045 LOTHAIRE, M., Combinatorics on words. Encyclopedia of Mathematics and its Applications, vol. 17, Addison-Wesley, London 1983.
oai:bdim.eu:RLIN_1999_9_10_1_25_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1999_9_10_1_25_0 On optimal \( L^{p} \) L p regularity in evolution equations Regolarità ottimale \( L^{p} \) L p in equazioni di evoluzione Lunardi Alessandra 1999 3 10 RLIN_1999_9_10 9 1 RLIN_1999_9_10_1 25 34 1768518 1023.47023 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Using interpolation techniques we prove an optimal regularity theorem for the convolution \( u(t) = \int_{0}^{t} T(t-s) f(s) ds \) u t = 0 t T t - s f s d s , where \( T(t) \) T t is a strongly continuous semigroup in general Banach space. In the case of abstract parabolic problems – that is, when \( T(t) \) T t is an analytic semigroup – it lets us recover in a unified way previous regularity results. It may be applied also to some non analytic semigroups, such as the realization of the Ornstein-Uhlenbeck semigroup in \( L^{p} (\mathbb{R}^{n}) \) L p R n , \( 1 < p < \infty \) 1 < p < , in which case it yields new optimal regularity results in fractional Sobolev spaces.

Usando tecniche di interpolazione si dimostra un teorema di regolarità ottimale per la convoluzione \( u(t) = \int_{0}^{t} T(t-s) f(s) ds \) u t = 0 t T t - s f s d s , dove \( T(t) \) T t è un semigruppo fortemente continuo in uno spazio di Banach qualunque. Nel caso dei problemi parabolici astratti – cioè quando \( T(t) \) T t è un semigruppo analitico – esso permette di ritrovare in modo unificato risultati di regolarità già noti. Il teorema può essere applicato anche nel caso di alcuni semigruppi non analitici, come ad esempio la realizzazione del semigruppo di Ornstein-Uhlenbeck in \( L^{p} (\mathbb{R}^{n}) \) L p R n , \( 1 < p < \infty \) 1 < p < , per il quale dà nuovi risultati di regolarità ottimale in spazi di Sobolev frazionari.

Abstract evolution equations Optimal regularity Interpolation provider bdim
147774 0109.32701 Agmon, S., On the eigenfunctions and the eigenvalues of general elliptic boundary value problems. Comm. Pure Appl. Math., 15, 1962, 119-147. 1373775 0851.35049 10.1080/03605309608821185 Cerrai, S., Elliptic and parabolic equations in \( \mathbb{R}^{n} \) R n with coefficients having polynomial growth. Comm. Part. Diff. Eqns., 21, 1996, 281-317. 1666273 1131.35393 Cerrai, S., Some results for second order elliptic operators having unbounded coefficients. Diff. Int. Eqns., to appear. 1454413 0881.47018 Da Prato, G., Some results on elliptic and parabolic equations in Hilbert spaces. Rend. Mat. Acc. Lincei, s.9, v.7, 1996, 181-199. 442749 0315.47009 Da Prato, G. - Grisvard, P., Sommes d’opérateurs linéaires et équations différentielles opérationelles. J. Maths. Pures Appliquées, 54, 1975, 305-387. 1343161 0846.47004 10.1006/jfan.1995.1084 Da Prato, G. - Lunardi, A., On the Ornstein-Uhlenbeck operator in spaces of continuous functions. J. Funct. Anal., 131, 1995, 94-114. 779538 0568.35047 10.1007/BF01762539 Di Blasio, G., Linear parabolic evolution equations in \( L^{p} \) L p spaces. Ann. Mat. Pura Appl., 138, 1984, 55-104. 1218138 0816.47044 10.1007/BF02573746 Di Blasio, G., Holomorphic semigroups in interpolation and extrapolation spaces. Semigroup Forum, 47, 1993, 105-114. 1640871 0941.47035 10.1007/PL00005986 Di Blasio, G., Limiting case for interpolation spaces generated by holomorphic semigroups. Semigroup Forum, to appear. 910825 0615.47002 10.1007/BF01163654 Dore, G. - Venni, A., On the closedness of the sum of two closed operators. Math. Z., 196, 1987, 189-201. 270209 0193.43502 Grisvard, P., Equations différentielles abstraites. Ann. Scient. Ec. Norm. Sup., 2, 1969, 311-395. 1240004 0797.35037 Guidetti, D., On elliptic systems in \( L^{1} \) L 1 . Osaka J. Math., 30, 1993, 397-429. 1115176 0713.46048 10.1007/BF02571401 Guidetti, D., On interpolation with boundary conditions. Math. Z., 207, 1991, 439-460. 0634.26008 Hardy, G. H. - Littlewood, J. E. - Pòlya, G., Inequalities. Cambridge Univ. Press, Cambridge 1934. Le Merdy, C., Counterexamples on \( L_{p} \) L p -maximal regularity. Preprint Éq. Math. Besançon 1997. 3012216 1261.35001 Lunardi, A., Analytic semigroups and optimal regularity in parabolic problems. Birkhäuser Verlag, Basel 1995. 1406778 0859.47030 10.1007/BF02574147 Lunardi, A., An interpolation method to characterize domains of generators of semigroups. Semigroup Forum, 53, 1996, 321-329. 1389786 0890.35030 10.1090/S0002-9947-97-01802-3 Lunardi, A., On the Ornstein-Uhlenbeck operator in \( L^{2} \) L 2 spaces with respect to invariant measures. Trans. Amer. Math. Soc., 349, 1997, 155-169. 1490820 0899.35014 Lunardi, A., Schauder theorems for linear elliptic and parabolic problems with unbounded coefficients in \( \mathbb{R}^{n} \) R n . Studia Math., 128, 1988, 171-198. 1475774 0887.35062 Lunardi, A., Schauder estimates for a class of degenerate elliptic and parabolic operators with unbounded coefficients in \( \mathbb{R}^{n} \) R n . Ann. Sc. Norm. Sup. Pisa, s. IV, 24, 1997, 133-164. 1472521 0887.47034 Lunardi, A. - Vespri, V., Optimal \( L^{\infty} \) L and Schauder estimates for elliptic and parabolic operators with unbounded coefficients. In: G. Caristi - E. Mitidieri (eds.), Proceedings of the Conference on Reaction-Diffusion Systems. Lect. Notes in Pure and Applied Math., 194, M. Dekker, New York 1998, 217-239. 1602271 0899.35027 Lunardi, A. - Vespri, V., Generation of strongly continuous semigroups by elliptic operators with unbounded coefficients in \( L^{p} (\mathbb{R}^{n}) \) L p R n . Rend. Istit. Mat. Univ. Trieste, (Special issue dedicated to the memory of Pierre Grisvard), 28, 1997, 251-279. 503903 0387.46032 Triebel, H., Interpolation theory, function spaces, differential operators. North-Holland, Amsterdam 1978.
oai:bdim.eu:RLIN_1999_9_10_2_61_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1999_9_10_2_61_0 On the smoothness of viscosity solutions of the prescribed Levi-curvature equation Regolarità delle soluzioni viscose dell’equazione della curvatura di Levi assegnata Citti Giovanna Lanconelli Ermanno Montanari Annamaria 1999 6 10 RLIN_1999_9_10 9 2 RLIN_1999_9_10_2 61 68 1768190 1010.35024 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

In this paper a \( C^{\infty} \) C -regularity result for the strong viscosity solutions to the prescribed Levi-curvature equation is announced. As an application, starting from a result by Z. Slodkowski and G. Tomassini, the \( C^{\infty} \) C -solvability of the Dirichlet problem related to the same equation is showed.

In questa Nota viene annunciato un teorema di regolarità \( C^{\infty} \) C delle soluzioni viscose, in senso forte, dell’equazione di Levi con assegnata curvatura. Da questo teorema, e da un precedente risultato di Slodkowski e Tomassini, segue la risultibilità \( C^{\infty} \) C , in senso classico, del problema di Dirichlet relativo alla stessa equazione.

Levi equation Viscosity solutions Non-linear vector fields \( C^{\infty} \) C ∞ -regularity Boundary value problem provider bdim
708370 0535.32008 10.2307/2374301 Bedford, E. - Gaveau, B., Envelopes of holomorphy of certain 2-spheres in \( C^{2} \) C 2 . Am. J. of Math., 105, 1983, 975-1009. 1632929 0921.35033 10.1016/S0294-1449(98)80033-4 Citti, G., \( C^{\infty} \) C regularity of solutions of the Levi equation. Analyse non Linéaire, Annales de l’I.H.P, 15, 1998, 517-534. 1351007 0834.35002 Cabré, X. - Caffarelli, L., Fully nonlinear elliptic equations. Amer. Math. Society, Providence 1995. 1118699 0755.35015 10.1090/S0273-0979-1992-00266-5 Crandall, M. G. - Ishii, H. - Lions, P. L., User’s guide to viscosity solutions of second order partial differential equations. Bull. Amer. Math Soc., (N.S.), 27, 1992, 1-67. 1734545 1211.35112 Citti, G. - Montanari, A., Strong solutions for the Levi curvature equation. Advances in Differential Equations, to appear. 1848050 1030.35019 10.1007/s10231-001-8196-z Citti, G. - Montanari, A., \( C^{\infty} \) C regularity of solutions of an equation of Levi’s type in \( \mathbb{R}^{2n+1} \) R 2 n + 1 . Preprint. 367477 0293.35012 Folland, G. B. - Stein, E. M., Estimates for the \( \bar{\partial}_{b} \) ¯ b complex and analysis on the Heisenberg group. Comm. Pure Appl. Math., 20, 1974, 429-522. 737190 0361.35003 Gilgarg, D. - Trudinger, N. S., Elliptic partial differential equations of second order. Springer-Verlag, Berlin-Heidelberg-New York-Tokio 1983. 847923 0591.32002 Range, R. M., Holomorphic functions and integral representations in several complex variables. Springer-Verlag, Berlin-Heidelberg-New York-Tokio 1986. 1136942 0744.35015 10.1016/0022-1236(91)90164-Z Slodkowski, Z. - Tomassini, G., Weak solutions for the Levi equation and envelope of holomorphy. J. Funct. Anal, 101, 4, 1991, 392-407.
oai:bdim.eu:RLIN_2000_9_11_S1_31_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2000_9_11_S1_31_0 A Lecture on Noncommutative Geometry Connes Alain 2000 12 11 RLIN_2000_9_11 9 S1 RLIN_2000_9_11_S1 Mathematics Towards The Third Millenium 31 64 1839740 1149.58302 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

The origin of Noncommutative Geometry is twofold. On the one hand there is a wealth of examples of spaces whose coordinate algebra is no longer commutative but which have obvious geometric meaning. The first examples came from phase space in quantum mechanics but there are many others, such as the leaf spaces of foliations, duals of nonabelian discrete groups, the space of Penrose tilings, the Noncommutative torus which plays a role in M-theory compactification and finally the Adele class space which is a natural geometric space carrying an action of the analogue of the Frobenius for global fields of zero characteristic. On the other hand the stretching of geometric thinking imposed by passing to Noncommutative spaces forces one to rethink about most of our familiar notions. The difficulty is not to add arbitrarily the adjective quantum behind our familiar geometric language but to develop far reaching extensions of classical concepts. Several of these new developments are described below with emphasis on the surprises from the noncommutative world.

provider bdim
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Sup., 8, n. 4, 1975, 383-419. 789385 0597.46063 CONNES, A., Factors of type $III_{1}$ I I I 1 , property $L^{1}_{\lambda}$ L λ 1 and closure of inner automorphisms. J. Operator Theory, 14, 1985, 189-211. 880070 0628.46061 10.1007/BF02392257 HAAGERUP, U., Connes' bicentralizer problem and uniqueness of the injective factor of type. $III_{1}$ I I I 1 . Acta Math., 158, 1987, 95-148. 1754766 CONNES, A., Noncommutative Geometry and the Riemann Zeta Function, invited lecture in IMU 2000 volume. To appear. 266247 ATIYAH, M. F., Global theory of elliptic operators. Proc. Internat. Conf. on Functional Analysis and Related Topics (Tokyo, 1969). University of Tokyo Press, Tokyo 1970, 21-30. 343319 SINGER, I. M., Future extensions of index theory and elliptic operators. Ann. of Math. Studies, 70, 1971, 171-185. 458196 0376.46036 10.2307/1970999 BROWN, L.G. - DOUGLAS, R.G. - FILLMORE, P.A., Extensions of $C^{\star}$ C -algebras and K-homology. 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Stud., Princeton University Press, Princeton, N.J. 1974. 285012 0224.57002 SULLIVAN, D., Geometric periodicity and the invariants of manifolds. Lecture Notes in Math., 197, Springer-Verlag, 1971. 1031992 LAWSON, B. - MICHELSON, M. L., Spin Geometry. Princeton 1989. 953915 0657.46049 10.1007/BF00533785 CONNES, A., Entire cyclic cohomology of Banach algebras and characters of $\theta$ θ summable Fredholm modules. K-theory, 1, 1988, 519-548. 954672 0656.58048 JAFFE, A. - LESNIEWSKI, A. - OSTERWALDER, K., Quantum K-theory: I. The Chem character. Comm. Math. Phys., 118, 1988, 1-14. 1334867 0960.46048 10.1007/BF01895667 CONNES, A. - MOSCOVICI, H., The local index formula in noncommutative geometry. Geom. Funct. Anal., 5, 1995, 174-243. 1303779 CONNES, A., Noncommutative geometry. Academic Press, San Diego Cal. 1994. 1657389 0940.58005 10.1007/s002200050477 CONNES, A. - MOSCOVICI, H., Hopf Algebras, Cyclic Cohomology and the Transverse Index Theorem. Comm. Math. Phys., 198, 1998, 199-246. 572645 CONNES, A., $C^{\star}$ C -algèbres et géométrie differentielle. C.R. Acad. Sci. Paris, Ser. A-B, 290, 1980, A599-A604. 1718047 10.1023/A:1007527510226 CONNES, A. - MOSCOVICI, H., Cyclic Cohomology and Hopf Algebras. Letters Math. Phys., 48, 1, 1999, 97-108. 1633004 10.4310/ATMP.1998.v2.n2.a4 KREIMER, D., On the Hopf algebra structure of perturbative Quantum Field Theory. Adv. Theor. Math. Phys., 2, 2, 1998, 303-334; q-alg/9707029. 1707611 0977.81091 10.1007/s002200050661 KREIMER, D., On overlapping divergencies. Comm. Math. Phys., 204, 1999, 669-689; hep-th/9810022. 1797019 0971.81093 10.4310/ATMP.1999.v3.n3.a7 KREIMER, D., Chen's iterated integral represents the operator product expansion. Adv. Theor. Math. Phys., 3, 3, 1999, to appear; hep-th/9901099. 1757650 10.1103/PhysRevD.60.105025 KREIMER, D. - DELBOURGO, R., Using the Hopf algebra structure of Quantum Field Theory in calculations. Phys. Rev., D 60, 1999, 105025-1-105025-14; hep-th/9903249. 1660199 0932.16038 10.1007/s002200050499 CONNES, A. - KREIMER, D., Hopf algebras, Renormalization and Noncommutative Geometry. Comm. Math. Phys., 199, 1998, 203-242; hep-th/9808042. 1720691 0957.81011 10.1088/1126-6708/1999/09/024 CONNES, A. - KREIMER, D., Renormalization in quantum field theory and the Riemann-Hilbert problem. J. High Energy Phys., 09, 1999, 024; hep-th/9909126. 1748177 1032.81026 10.1007/s002200050779 CONNES, A. - KREIMER, D., Renormalization in quantum field theory and the Riemann-Hilbert problem I. the Hopf algebra structure of graphs and the main theorem. Comm. Math. Phys., 210, 1, 2000, 249-273; hep-th/9912092. 1042.81059 CONNES, A. - KREIMER, D., Renormalization in quantum field theory and the Riemann-Hilbert problem II. The $\beta$ β function, diffeomorphisms and the renormalization group, hep-th/0003188. 1441908 0881.58009 CONNES, A., Gravity coupled with matter and foundation of noncommutative geometry. Comm. Math. Phys., 182, 1996, 155-176. 1336738 0826.58008 10.1016/0393-0440(94)00032-Y KALAU, W. - WALZE, M., Gravity, noncommutative geometry and the Wodzicki residue. J. of Geom. and Phys., 16, 1995, 327-344. 1312438 0823.58046 KASTLER, D., The Dirac operator and gravitation. Comm. Math. Phys., 166, 1995, 633-643. 1355905 0871.58008 10.1063/1.531241 CONNES, A., Noncommutative geometry and reality. Journal of Math. Physics, 36, n.11, 1995, 6194-6231. 367670 10.1016/0022-4049(74)90003-6 RIEFFEL, M. A., Morita equivalence for $C^{\star}$ C -algebras and $W^{\star}$ W -algebras. J. Pure Appl. Algebra, 5, 1974, 51-96. 1421823 0864.53025 GROMOV, M., Carnot-Carathéodory spaces seen from within. Preprint IHES/M/94/6. 1419931 1020.46505 10.1103/PhysRevLett.77.4868 CHAMSEDINE, A. - CONNES, A., Universal formulas for noncommutative geometry actions. Phys. Rev. Letters, 77, 24, 1996, 4868-4871. 1616407 CONNES, A., Noncommutative Geometry: The Spectral Aspect. Les Houches Session LXIV, Elsevier 1998, 643-685. 587369 0474.46059 PIMSNER, M. - VOICULESCU, D., Exact sequences for K groups and Ext group of certain crossed product $C^{\star}$ C -algebras. J. Operator Theory, 4, 1980, 93-118. 703981 0541.46055 10.1112/plms/s3-47.2.285 RIEFFEL, M. A., The cancellation theorem for projective modules over irrational rotation $C^{\star}$ C -algebras. Proc. London Math. Soc., 47, 1983, 285-302. 878383 10.1090/conm/062/878383 CONNES, A. - RIEFFEL, M. A., Yang-Mills for noncommutative two-tori. In: Operator algebras and mathematical physics (Iowa City, Iowa, 1985). Contemp. Math. Oper. Algebra Math. Phys., 62, Amer. Math. Soc., Providence, RI, 1987, 237-266. 1613978 10.1088/1126-6708/1998/02/003 CONNES, A. - DOUGLAS, M. R. - Schwartz, A., Noncommutative geometry and Matrix theory: compactification on tori. J. High Energy Physics, 2, 1998. 1768641 0974.58008 10.1063/1.533329 CONNES, A., A short survey of noncommutative geometry. J. Math. Physics, 41, 2000.
oai:bdim.eu:RLIN_2001_9_12_3_159_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2001_9_12_3_159_0 Variational approximation of flux in conforming finite element methods for elliptic partial differential equations : a model problem Approssimazione variazionale del flusso con elementi finiti conformi per problemi lineari ellittici : un problema modello Brezzi Franco Hughes Thomas J. R. Süli Endre 2001 9 12 RLIN_2001_9_12 9 3 RLIN_2001_9_12_3 159 166 1898457 1221.65304 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

We consider the approximation of elliptic boundary value problems by conforming finite element methods. A model problem, the Poisson equation with Dirichlet boundary conditions, is used to examine the convergence behavior of flux defined on an internal boundary which splits the domain in two. A variational definition of flux, designed to satisfy local conservation laws, is shown to lead to improved rates of convergence.

Si affronta il problema di approssimare il flusso del gradiente della soluzione di un problema ai limiti per una equazione lineare ellittica del secondo ordine, prendendo come problema modello il problema di Dirichlet per l’operatore di Laplace in due dimensioni spaziali. La linea $\Gamma$ Γ lungo la quale si vuole approssimare il flusso è supposta essere rettilinea. L’approssimazione è costruita con elementi finiti continui e localmente polinomiali di grado $\le k$ k , con $k$ k intero $\ge 1$ 1 . Tramite una opportuna definizione variazionale del flusso approsssimato, si ottengono stime dell’errore ottimali in spazi del tipo di $H^{-k-\frac{1}{2}} (\Gamma)$ H - k - 1 2 Γ .

Finite element methods Conservation Error estimates Flux functionals provider bdim
0535.73052 Babuška, I. - Miller, A., The post processing approach in the finite element method, part 1: calculation of displacements, stresses and other higher derivatives of the displacements. Internat. J. Numer. Methods. Engrg., 34, 1984, 1085-1109. 0535.73053 Babuška, I. - Miller, A., The post processing approach in the finite element method, part 2: the calculation of stress intensity factors. Internat. J. Numer. Methods. Engrg., 34, 1984, 1111-1129. 0555.73072 Babuška, I. - Miller, A., The post processing approach in the finite element method, part 3: a posteriori estimates and adaptive mesh selection. Internat. J. Numer. Methods. Engrg., 34, 1984, 1131-1151. 1306924 0813.65118 10.1137/1036141 Babuška, I. - Suri, M., The $p$ p and $h-p$ h - p versions of the finite element method, basic principles and properties. SIAM Review, 36(4), 1994, 578-632. 968084 0619.65098 10.1093/imanum/7.2.129 Barrett, J.W. - Elliott, C.M., Total flux estimates for a finite element approximation of elliptic equations. IMA J. Numer. Anal., 7, 1987, 129-148. 431744 0353.65064 Bramble, J.H. - Schatz, A.H., Higher order local accuracy by averaging in the finite element method. Mathematics of Computation, 31, 1977, 94-111. 1115235 0511.65078 Ciarlet, Ph.G., The finite element methods for elliptic problems. North Holland, Amsterdam 1978. 1842161 10.1007/978-3-642-59721-3_1 Cockburn, B. - Luskin, M. - Shu, C.-W. - Süli, E., Postprocessing of the discontinuous Galerkin finite element method. In: B. Cockburn - G. Karniadakis - C.-W. Shu (eds.), Discontinuous Galerkin Finite Element Methods. Lecture Notes in Computational Science and Engineering, vol. 11, Springer-Verlag, 2000; extended version submitted to Mathematics of Computation, 2000. Giles, M.B. - Larson, M.G. - Levenstam, M. - Süli, E., Adaptive error control for finite element approximations of the lift and drag in a viscous flow. Technical Report NA-97/06, Oxford University Computing Laboratory, Wolfson Building, Parks Road, Oxford OX1 3QD, 1997. 1783558 0969.65104 10.1006/jcph.2000.6577 Hughes, T.J.R. - Engel, G. - Mazzei, L. - Larson, M.G., The Continuous Galerkin Method is Locally Conservative. Journal of Computational Physics, 163, 2000, 467-488. 0165.10801 Lions, J.L. - Magenes, E., Problèmes aux limites non homogènes et applications. Vol. 1, Dunod, Paris 1968. 998911 0661.65111 10.1007/BF01398917 Marini, L.D. - Quarteroni, A., A relaxation procedure for domain decomposition methods using finite elements. Numer. Math., 55, 1989, 575-598. 1439050 0826.65092 Wahlbin, L.B., Superconvergence in Galerkin Finite Element Methods. Lecture Notes in Mathematics, 1605, Springer-Verlag, 1977. Wheeler, J.A., Simulation of heat transfer from a warm pipeline buried in permafrost. Proceedings of the 74th National meeting of the American Institute of Chemical Engineering, 1973.
oai:bdim.eu:RLIN_1998_9_9_3_149_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1998_9_9_3_149_0 On rates of propagation for Burgers’ equation Proprietà di trasmissione per l’equazione di Burgers Day William Alan Saccomandi Giuseppe 1998 9 9 RLIN_1998_9_9 9 3 RLIN_1998_9_9_3 149 156 1683005 0929.35134 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

We give asymptotic formulae for the propagation of an initial disturbance of the Burgers’ equation.

Si dimostrano alcune formule asintotiche che sono di interesse nello studio del problema di Cauchy per l’equazione di Burgers. Queste formule permettono di seguire l’evoluzione dei massimi di un dato iniziale con un supporto compatto.

Burgers’ equation Rate of propagation of a disturbance Hopf-Cole transformation provider bdim
1175584 0756.35035 10.1007/BF02844459 Fichera, G., Is the Fourier theory of heat propagation paradoxical? Rend. Circ. Mat. Palermo, 41, 1992, 5-28. 1028.35088 Day, W. A. - Saccomandi, G., On the propagation of the bulk of a disturbance for a hyperbolic equation. Quart. Appl. Math., to appear. 1028.35056 Day, W. A. - Saccomandi, G., On the propagation of the bulk of a mass distribution subject to periodic convection and diffusion. Quart. Appl. Math., to appear. 1433756 0886.35068 Day, W. A., On rates of propagation of heat according to Fourier’s theory. Quart. Appl. Math., 55, 1997, 127-138. 1466149 0979.35505 Day, W. A., A note on the propagation of temperature disturbances. Quart. Appl. Math., 55, 1997, 565-572. 483954 0373.76001 Witham, G. B., Linear and nonlinear waves. Wiley-Interscience, New York 1974.
oai:bdim.eu:RLIN_2001_9_12_2_107_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2001_9_12_2_107_0 Density of chaotic dynamics in periodically forced pendulum-type equations Densità delle dinamiche caotiche in equazioni di tipo pendolo forzato Bosetto Elena Serra Enrico Terracini Susanna 2001 6 12 RLIN_2001_9_12 9 2 RLIN_2001_9_12_2 107 113 1898453 1072.37048 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

We announce that a class of problems containing the classical periodically forced pendulum equation displays the main features of chaotic dynamics for a dense set of forcing terms in a space of periodic functions with zero mean value. The approach is based on global variational methods.

Si annuncia che una classe di problemi contenente l’equazione del pendolo forzato periodicamente presenta le principali caratteristiche della dinamica caotica per un insieme denso di termini forzanti nell’insieme delle funzioni periodiche a media nulla. I metodi sono di natura variazionale.

Heteroclinic solutions Variational Methods Implicit Function Theorem provider bdim
1800617 0994.34029 Alessio, F. - Calanchi, M. - Serra, E., Complex dynamics in a class of reversible equations. Progr. in Diff. Eqs. Appl., 43, Birkhäuser, Boston 2001, 147-159. 1719214 0941.34032 10.1017/S0308210500030985 Alessio, F. - Caldiroli, P. - Montecchiari, P., Genericity of the multibump dynamics for almost periodic Duffing-like systems. Proc. Royal Soc. Edinburgh, 129A, 1999, 885-901. 1614571 1004.37043 10.1016/S0294-1449(97)89300-6 Ambrosetti, A. - Badiale, M., Homoclinics: Poincaré-Melnikov type results via a variational approach. Ann. IHP, Anal. non Linéaire, 15, 1998, 233-252. 1804651 0978.37024 10.1016/S0294-1449(00)00054-8 Bosetto, E. - Serra, E., A variational approach to chaotic dynamics in periodically forced nonlinear oscillators. Ann. IHP, Anal. non Linéaire, 17, 2000, 673-709. 1890600 1012.34040 10.1006/jdeq.2001.4053 Bosetto, E. - Serra, E. - Terracini, S., Generic-type results for chaotic dynamics in equations with periodic forcing terms. Preprint 2000. 1374173 0860.58027 10.1002/(SICI)1097-0312(199603)49:3&lt;285::AID-CPA3&gt;3.3.CO;2-# Buffoni, B. - Séré, E., A global condition for quasi-random behavior in a class of conservative systems. Comm. Pure Appl. Math., 49, 1996, 285-305. 1714117 0967.34041 10.1007/s005260050136 Calanchi, M. - Serra, E., Homoclinic solutions to periodic motions in a class of reversible equations. Calc. Var. and PDEs, 9, 1999, 157-184. 1106121 0742.34043 10.1016/0022-0396(91)90135-V Martinez-Amores, P. - Mawhin, J. - Ortega, R. - Willem, M., Generic results for the existence of nondegenerate periodic solutions of some differential systems with periodic nonlinearities. J. Diff. Eq., 91, 1991, 138-148. 1080112 0737.58029 10.2307/2939275 Mather, J. N., Variational construction of orbits of twist diffeomorphisms. J. of AMS, 4, 1991, 207-263. 1304144 0818.34025 10.1017/S0143385700008178 Rabinowitz, P. H., Heteroclinics for a reversible Hamiltonian system. Ergod. Th. and Dyn. Sys., 14, 1994, 817-829. 1269671 0835.34050 Rabinowitz, P. H., Heteroclinics for a reversible Hamiltonian system, 2. Diff. and Int. Eq., 7, 1994, 1557-1572. 1804957 0981.37020 10.1017/S0143385700000985 Rabinowitz, P. H., Connecting orbits for a reversible Hamiltonian system. Ergod. Th. and Dyn. Sys., to appear. 1249107 0803.58013 Séré, E., Looking for the Bernoulli shift. Ann. IHP, Anal. non Linéaire, 10, 1993, 561-590. 1419011 0864.34038 10.1006/jdeq.1996.0160 Serra, E. - Tarallo, M. - Terracini, S., On the structure of the solution set of forced pendulum-type equations. J. Diff. Eq., 131, 1996, 189-208. 1694395 0948.37022 10.1016/S0362-546X(98)00051-0 Terracini, S., Non degeneracy and chaotic motions for a class of almost-periodic Lagrangian systems. Nonlin. Anal. TMA, 37, 1999, 337-361. 1056699 1027.37002 Wiggins, S., Introduction to applied nonlinear dynamical systems and chaos. Springer-Verlag, New York 1990.
oai:bdim.eu:RLIN_1999_9_10_4_271_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1999_9_10_4_271_0 Existence and regularity of solutions of the \( \bar{\delta} \) δ ¯ -system on wedges of \( \mathbb{C}^{N} \) C N Esistenza e regolarità delle soluzioni del sistema \( \bar{\delta} \) δ ¯ in «wedges» di \( \mathbb{C}^{N} \) C N Zampieri Giuseppe 1999 12 10 RLIN_1999_9_10 9 4 RLIN_1999_9_10_4 271 278 1767934 1022.32014 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

For a wedge \( W \) W of \( \mathbb{C}^{N} \) C N , we introduce two conditions of weak \( q \) q -pseudoconvexity, and prove that they entail solvability of the \( \bar{\delta} \) δ ¯ -system for forms of degree \( \ge q + 1 \) q + 1 with coefficients in \( C^{\infty} (W) \) C W and \( C^{\infty} (\bar{W}) \) C W ¯ respectively. Existence and regularity for \( \bar{\delta} \) δ ¯ in \( W \) W is treated by Hörmander [5, 6] (and also by Zampieri [9, 11] in case of piecewise smooth boundaries). Regularity in \( W \) W is treated by Henkin [4] (strong \( q \) q -pseudoconvexity by the method of the integral representation), Dufresnoy [3] (full pseudoconvexity), Michel [8] (constant number of negative eigenvalues), and Zampieri [10] (more general \( q \) q -pseudoconvexity and wedge type domains). This is an announcement of our papers [10, 11]; it contains refinements both in statements and proofs and, mainly, a parallel treatement of regularity in \( W \) W and \( \bar{W} \) W ¯ . All our techniques strongly rely on the method of \( L^{2} \) L 2 estimates by Hörmander [5, 6].

Si introducono due condizioni di \( q \) q -pseudoconvessità debole per un «wedge» di \( \mathbb{C}^{N} \) C N , e si dimostra che esse sono sufficienti per la risolubilità del sistema \( \bar{\delta} \) δ ¯ per forme di grado \( \ge q + 1 \) q + 1 a coefficienti in \( C^{\infty} (W) \) C W e \( C^{\infty} (\bar{W}) \) C W ¯ rispettivamente. Esistenza e regolarità in \( W \) W per il \( \bar{\delta} \) δ ¯ sono trattate da Hörmander [5, 6] (e anche da Zampieri [9, 11] per bordi \( C^{2} \) C 2 a tratti). Regolarità in \( W \) W è trattata da Henkin [4] ( \( q \) q -pseudoconvessità forte con il metodo della rappresentazione integrale), Dufresnoy [3] (pseudoconvessità «completa»), Michel [8] (costanza del numero di autovalori negativi) e Zampieri [10] ( \( q \) q -pseudoconvessità più generale e domini di tipo «wedge»). Questa è una nota preliminare agli articoli [10, 11]; contiene miglioramenti negli enunciati e nelle dimostrazioni e, soprattutto, una trattazione parallela della regolarità in \( W \) W e \( \bar{W} \) W ¯ . Tutte le tecniche qui impiegate si basano profondamente sul metodo delle stime \( L^{2} \) L 2 introdotto da Hörmander in [5, 6].

L2 estimates Cauchy-Riemann system C R structures provider bdim
747791 0589.32035 Airapetyan, R.A. - Henkin, G.M., Integral representation of differential forms on Cauchy-Riemann manifolds and the theory of \( CR \) C R -functions. Uspekhi Mat. Nauk., 39 (3), 1984, 39-106. 150342 0106.05501 Andreotti, A. - Grauert, H., Théorèmes de finitude pour la cohomologie des espaces complexes. Bull. Soc. Math. France, 90, 1962, 193-259. 526786 0387.32011 Dufresnoy, A., Sur l’operateur \( \bar{\delta} \) δ ¯ et les fonctions différentiables au sens de Whitney. Ann. Inst. Fourier, 29 (1), 1979, 229-238. 454067 0358.35057 Henkin, G.M., H. Lewy’s equation and analysis on pseudoconvex manifolds (Russian). I. Uspehi Mat. Nauk., 32 (3), 1977, 57-118. 179443 0158.11002 Hörmander, L., \( L^{2} \) L 2 estimates and existence theorems for the \( \bar{\delta} \) δ ¯ operator. Acta Math., 113, 1965, 89-152. 0138.06203 Hörmander, L., An introduction to complex analysis in several complex variables. Van Nostrand, Princeton, N.J. 1966. 149510 0118.31101 Kohn, J.J., Regularity at the boundary of the \( \bar{\delta} \) δ ¯ -Neumann problem. Proceedings of the National Academy of Sciences of the United States of America, 49, 1963, 206-213. 1198845 10.1007/BF01444880 Michel, V., Sur la regularité \( C^{\infty} \) C du \( \bar{\delta} \) δ ¯ au bord d’un domaine de \( \mathbb{C}^{n} \) C n dont la forme de Levi a exactement \( s \) s valeurs propres strictement negatives. Math. Ann., 195, 1993, 131-165. 1631646 0954.32025 10.1007/BF02819447 Zampieri, G., \( L^{2} \) L 2 -estimates with Levi-singular weight, and existence for \( \bar{\delta} \) δ ¯ . J. d’Analyse Math., 74, 1998, 99-112. 1767934 Zampieri, G., Solvability of \( \bar{\delta} \) δ ¯ with \( C^{\infty} \) C regularity up to the boundary on wedges of \( \mathbb{C}^{n} \) C n . Israel J. of Math., 1999, in press. 1737843 10.1006/jmaa.1999.6629 Zampieri, G., \( C^{\infty} \) C solvability of the \( \bar{\delta} \) δ ¯ system on wedges of \( \mathbb{C}^{n} \) C n . Preprint 1998.
oai:bdim.eu:RLIN_1990_9_1_4_301_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1990_9_1_4_301_0 Iterati di operatori differenziali singolari e funzioni ultradifferenziabili. II Iterates of singular differential operators and ultradifferentiable functions. II Bondioli Cristiana 1990 12 1 RLIN_1990_9_1 9 4 RLIN_1990_9_1_4 301 304 1096822 0727.47035 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

In questa Nota, che è il seguito della Nota I dallo stesso titolo, si dimostra che l'applicazione \( ^{t}\mathcal{X} \) X t , legata all'operatore di trasmutazione associato all'operatore singolare \( P \) P , è un isomorfismo algebrico e topologico tra gli spazi \( \mathcal{G}^{s}_{*}(P) \) G * s P e \( \mathcal{G}^{s}_{*} \) G * s .

This Note is the continuation of a previous paper with the same title. Here we prove that the map \( ^{t}\mathcal{X} \) X t associated with the transmutation operator of the singular operator \( P \) P is an algebraic and topological isomorphism between the spaces \( \mathcal{G}^{s}_{*}(P) \) G * s P and \( \mathcal{G}^{s}_{*} \) G * s .

Singular differential operators Ultradifferentiable functions Transmutation operators provider bdim
oai:bdim.eu:RLIN_2000_9_11_2_67_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2000_9_11_2_67_0 Stochastic invariance and consistency of financial models Invarianza stocastica e consistenza dei modelli finanziari Zabczyk Jerzy 2000 6 11 RLIN_2000_9_11 9 2 RLIN_2000_9_11_2 67 80 1797512 0978.60039 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

The paper is devoted to a connection between stochastic invariance in infinite dimensions and a consistency question of mathematical finance. We derive necessary and sufficient conditions for stochastic invariance of Nagumo’s type for stochastic equations with additive noise. They are applied to Ornstein-Uhlenbeck processes and to specific financial models. The case of evolution equations with general noise is discussed also and a comparison with recent results obtained by geometric methods is presented as well.

Questo lavoro riguarda la connessione fra l’invarianza stocastica in dimensione infinita e un problema di consistenza in finanza matematica. Vengono date condizioni necessarie e sufficienti di tipo Nagumo per l’invarianza di equazioni stocastiche con rumore additivo. Esse sono applicate a processi di Ornstein-Uhlenbeck e specifici modelli finanziari. Vengono anche discusse equazioni di evoluzione con rumore generale e viene fatto un paragone con recenti risultati ottenuti con metodi geometrici.

Stochastic equations Invariant sets Forward curve Consistency provider bdim
1134779 1179.93001 Aubin, J. P., Viability Theory. Birkhäuser, Boston-Basel 1991. 1603852 0931.60059 10.1080/07362999808809512 Aubin, J. P. - Da Prato, G., The viability theorem for stochastic differential inclusions. Stochastic Analysis and Applications, 16, 1998, 1-15. 1330767 0835.60053 Bally, V. - Millet, A. - Sanz-Sole, M., Approximation and support theorem in Holder norm for parabolic stochastic partial differential equations. Annals of Probability, 23, 1995, 178-222. 1849252 0980.91030 10.1111/1467-9965.00072 Björk, T. - Christensen, B. J., Interest rate dynamics and consistent forward rate curves. Math. Finance, to appear. Björk, T. - Gombani, A., Minimal realizations of forward rates. Finance and Stochastics, vol. 3, 1999, 423-432. 2976683 0889.90019 Björk, T. - Di Masi, G. - Kabanov, Yu. - Runggaldier, W., Towards a general theory of bond markets. Finance and Stochastic, vol. 1, 1996, 141-174. 1055.91017 Björk, T. - Lars Svensson, , On the existence of finite dimensional realizations for nonlinear forward rate models. Preprint, March 1999. 1446645 0884.90008 10.1111/1467-9965.00028 Brace, A. - Gątarek, D. - Musiela, M., The market model of interest rate dynamics. Math. Finance, 7, 1997, 127-154. 0884.90016 Brace, A. - Musiela, M., A multifactor Gauss Markov implementation of Heath, Jarrow and Morton. Math. Finance, 4, 1994, 259-283. 1009.91036 Bouchaud, J. P. - Cont, R. - El Karoui, N. - Potters, M. - Sagna, N., Phenomenology of the interest rate curve: a statistical analysis of the term structure deformations. Working paper, 1997. (http:= =econwpa.wustl.edu/ewp-fin/9712009). 2144706 1113.91020 10.1142/S0219024905003049 Cont, R., Modelling term structure dynamics: an infinite dimensional approach. International Journal of Theoretical and Applied Finance, to appear. 1207136 1140.60034 10.1017/CBO9780511666223 Da Prato, G. - Zabczyk, J., Stochastic Equations in Infinite Dimensions. Cambridge University Press, Cambridge-New York 1992. 1417491 0849.60052 10.1017/CBO9780511662829 Da Prato, G. - Zabczyk, J., Ergodicity for Infinite Dimensional Systems. Cambridge University Press, Cambridge-New York 1996. 1800535 0970.60069 10.1007/PL00008744 Filipovic, D., Invariant Manifolds for Weak Solutions to Stochastic Equations. Manuscript, March 1999. 1454714 0866.90016 Gątarek, D., Some remarks on the market model of interest rates. Control and Cybernetics, vol. 25, 1996, 1233-1244. 0751.90009 Heath, D. - Jarrow, R. - Morton, A., Bond pricing and the term structure of interest rates: a new methodology. Econometrica, 60, 1992, 77-101. 1466843 0892.47064 Jachimiak, W., A note on invariance for semilinear differential equations. Bull. Pol. Sci., 44, 1996, 179-183. Jachimiak, W., Invariance problem for evolution equations. PhD Thesis, Institute of Mathematics Polish Academy of Sciences, Warsaw 1998 (in Polish). Jachimiak, W., Stochastic invariance in infinite dimensions. Preprint 591, Institute of Mathematics Polish Academy of Sciences, Warsaw, October 1998. Milian, A., Nagumo’s type theorems for stochastic equations. PhD Thesis, Institute of Mathematics Polish Academy of Sciences, 1994. 1429859 0876.60034 10.1080/07362999708809465 Milian, A., Invariance for stochastic equations with regular coefficients. Stochastic Analysis and Applications, 15, 1997, 91-101. 1262971 0794.60061 10.1007/BF01192259 Millet, A. - Sanz-Sole, M., The support of the solution to a hyperbolic spde. Probab. Th. Rel. Fields, 84, 1994, 361-387. Millet, A. - Sanz-Sole, M., Approximation and support theorem for a two space-dimensional wave equations. Mathematical Sciences Research Institute, Preprint No. 1998-020, Berkeley, California. Musiela, M., Stochastic PDEs and term structure models. Journees International de Finance, IGR-AFFI, La Baule 1993. 1474500 0906.60001 Musiela, M. - Rutkowski, M., Martingale Methods in Financial Modelling. Applications of Mathematics, vol. 36, Springer-Verlag, 1997. 637080 0344.45001 Pavel, N., Invariant sets for a class of semilinear equations of evolution. Nonl. Anal. Theor., 1, 1977, 187-196. Pavel, N., Differential equations, flow invariance. Pitman Lecture Notes, Boston 1984. 1678432 Tessitiore, G. - Zabczyk, J., Comments on transition semigroups and stochastic invariance. Scuola Normale Superiore, Pisa 1998, preprint. 1353194 0839.60059 10.1080/07362999508809419 Twardowska, K., An approximation theorem of Wong-Zakai type for nonlinear stochastic partial differential equations. Stoch. Anal. Appl., 13, 1995, 601-626. 1215779 0777.60051 Twardowska, K., Approximation theorems of Wong-Zakai type for stochastic differential equations in infinite dimensions. Dissertationes Mathematicae, CCCXXV, 1993. 400425 0255.60056 Stroock, D. W. - Varadhan, S. R. S., On the support of diffusion processes with applications to the strong maximum principle. Proceedings 6th Berkeley Symposium Math. Statist. Probab., vol. 3, University of California Press, Berkeley 1972, 333-359. Yosida, K., Functional Analysis. Springer-Verlag, 1965. 1193920 1123.93003 Zabczyk, J., Mathematical Control Theory: An Introduction. Birkhäuser, Boston 1992. 1797512 0978.60039 Zabczyk, J., Stochastic invariance and consistency of financial models. Preprints di Matematica n. 7, Scuola Normale Superiore, Pisa 1999.
oai:bdim.eu:RLIN_1992_9_3_2_141_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1992_9_3_2_141_0 Sull'invertibilità dell'equazione costitutiva della viscoelasticità lineare On the inversion of linear viscoelastic constitutive equation Fabrizio Mauro 1992 6 3 RLIN_1992_9_3 9 2 RLIN_1992_9_3_2 141 148 1170213 0756.73006 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Viene affrontato lo studio della inversione dell'equazione costitutiva (1.2) della viscoelasticità lineare, in funzione dei diversi spazi topologici su cui si può definire tale problema. In particolare si mostra che l'inversione di (1.2) ammette risposte completamente diverse al variare degli spazi di definizione, anche quando tali spazi vengono scelti sulla base delle topologie legate alle funzioni energia del problema considerato.

The inversion of viscoelastic constitutive equation (1.2) is studied in conjunction with different topological spaces on which this problem can be defined. Furthermore we show that the inversion of (1.2) does not admit a unique response, because the topology of state space determines the problem. This question exists also if the topology is joined to natural energy functions of the problem considered.

Viscoelasticity Constitutive equation Free energies provider bdim
1081399 0709.45004 FICHERA, G., I difficili rapporti fra l'analisi funzionale e la fisica matematica. Rend. Mat. Acc. Lincei, s. 9, 1, 1990, 161-170. 823436 10.1016/0093-6413(85)90038-2 FICHERA, G., On linear viscoelasticity. Mech. Res. Comm., 12, 1985, 241-242. 0715.73031 FICHERA, G., Sui materiali elastici con memoria. Atti Acc. Lincei Rend. fis., s. 8, v. 82, 1988, 473-478. FABRIZIO, M. - MORRO, A. - GIORGI, C., Normed spaces and free energies for linear viscoelasticity. In corso di stampa. 0535.73029 GRAFFI, D., Sull'equazione analitica di alcune grandezze termodinamiche nei materiali con memoria. Rend. Sem. Mat. Univ. Padova, 68, 1982, 17-29. 928727 0661.73019 10.1007/BF00041695 FABRIZIO, M. - MORRO, A., Viscoelastic relaxation functions compatible with thermodynamics. J. Elasticity, 19, 1988, 63-75. 54.0882.02 GRAFFI, D., Sui problemi dell'ereditarietà lineare. Nuovo Cimento, 5, 1928, 53-96. 226901 0167.24704 COLEMAN, B. P. - MIZEL, V. J., On the general theory of fading memory. Arch. Rational Mech. Anal., 29, 1968, 18-31. 249038 0214.52405 DAY, W. A., A theory of thermodynamics for materials with memory. Arch. Rational Mech. Anal., 34, 1969, 85-96.
oai:bdim.eu:RLIN_1992_9_3_3_149_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1992_9_3_3_149_0 Teoria degli operatori intermedi e applicazioni: statica elastica con coefficienti discontinui, il problema degli spostamenti Theory and applications of intermediate operators: elastostatics with discontinuous coefficients, the problem of the displacements Lanzara Flavia 1992 9 3 RLIN_1992_9_3 9 3 RLIN_1992_9_3_3 149 171 1186911 0785.73015 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Viene applicata la teoria della Nota I al problema al contorno dell'elastostatica quando sul contorno vengono prescritti spostamenti nulli. I coefficienti elastici sono supposti solo limitati e misurabili. Come problema base viene assunto l'analogo problema al contorno per un corpo isotropo omogeneo. Per un tale problema vengono esplicitamente costruiti l'operatore e la matrice di Green e le loro proprietà esaurientemente studiate, in modo tale che la teoria degli operatori intermedi, come sviluppata nella Nota I, possa essere applicata al caso generale.

The theory of Note I is applied to the boundary value problem of Elastostatics when vanishing displacements are given on the boundary. The elastic coefficients are only supposed to be bounded and measurable. As a base problem the analogous B. V. P. for an isotropic homogeneous body is assumed. For this problem the Green operator and the Green matrix are explicitly constructed and their properties exhaustively studied, so that the theory of Intermediate Operators, as developed in Note I, can be applied to the general case.

Elastostatics with discontinuous coefficients Green's operator Green's matrix provider bdim
0065.08702 PICONE, M., Sur un problème noveau pour l'équation linéaire aux dérivées partielles de la théorie mathématique classique de l'élasticité. Colloque sur les équations aux dérivées partielles, CBRM, Bruxelles, Mai, 1954, 9-11. 74665 0068.31101 FICHERA, G., Alcuni recenti sviluppi della teoria dei problemi al contomo per le equazioni alle derivate parziali lineari. Atti Conv. Intern., sulle Eq. alle derivate parziali, Trieste 1954, 174-227. 43.0887.01 LICHTENSTEIN, L., Uber das Poissonsche Integrai und uber die partiellen Ableitungen zweiter Ordnung des logaritmischen Potentials. J. Math., vol. 141, 1912, 12-42. 20686 0029.26603 FRIEDRICHS, K. O., A Theorem of Lichtenstein. Duke Math. J., vol. 14, 1947, 67-82. FICHERA, G., Existence Theorems in Elasticity. Handbuch der Physik, vol. VIa/2, Springer Verlag, New York 1972, 347-389. 42040 0041.06701 FICHERA, G., Sull'esistenza delle soluzioni di problemi al contorno, relativi all'equilibrio di un corpo elastico. Ann. Sc. Norm. Sup. Pisa, s. III , vol. IV, fasc. 1-2, 1950, 35-101. 475095 CASTELLANI, P., On the first boundary value problem for the classical theory of elasticity in a three-dimensional domain with a singular boundary. J. of Elasticity, vol. 3, n. 4, 1973, 225-259. 0226.30001 FICHERA, G. - DE VITO, L., Funzioni analitiche di una variabile complessa. Libreria Veschi, III ediz., Roma 1971. 5359 0031.01204 PICONE, M., Appunti di Analisi Superiore. Rondinella, Napoli 1940.
oai:bdim.eu:RLIN_1997_9_8_4_293_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1997_9_8_4_293_0 Una classe di varietà quaternionali che ammettono una struttura complessa compatibile A class of quaternionic manifolds admitting a compatible complex structure Ornea Liviu Piccinni Paolo 1997 12 8 RLIN_1997_9_8 9 4 RLIN_1997_9_8_4 293 298 1631618 0912.53016 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Si dimostra l'esistenza di una struttura complessa compatibile globale sulle varietà quaternionali di Hermite-Weyl compatte regolari. Se ne deducono alcune restrizioni sui numeri di Betti.

The existence of a global compatible complex structure is proved on compact regular quaternion Hermitian-Weyl manifolds. Some restrictions on the Betti numbers are deduced.

Quaternionic manifold Weyl structure Compatible complex structure provider bdim
1475674 0933.53017 10.1090/S0002-9947-99-02201-1 ALEKSEEVSKY, D. V. - MARCHIAFAVA, S. - PONTECORVO, M., Compatible Complex Structures on Almost Quatemionic Manifolds. E. Schrödinger Int. Inst. Vienna, preprint 404, 1996. 1648844 0912.53015 10.1023/A:1006574700453 ALEKSEEVSKY, D. V. - MARCHIAFAVA, S. - PONTECORVO, M., Compatible Almost Complex Structures on Quaternion Kähler Manifolds. E. Schrödinger Int. Inst. Vienna, preprint 419, 1997. 867684 1147.53001 BESSE, A., Einstein Manifolds. Springer-Verlag, 1987. 1293878 0889.53029 BOYER, CH. P. - GALICKI, K. - MANN, B., The geometry and topology of 3-sasakian manifolds. J. Reine Angew. Math., 455, 1994, 183-220. 1363825 0858.53039 10.1515/crll.1995.469.1 GAUDUCHON, P., Structures de Weyl-Einstein, espaces de twisteurs et variétés de type \( S^{1} \times S^{3} \) S 1 × S 3 . J. Reine Angew. Math., 469, 1995, 1-50. 1288469 0815.53078 10.1007/BF01231528 LEBRUN, C. R. - SALAMON, S. M., Strong rigidity of positive quaternion Kähler manifolds. Invent. Math., 118, 1994, 109-132. 144288 0088.14401 MARTINELLI, E., Varietà a struttura quaternionale generalizzata. Atti Acc. Lincei Rend, fis., s. 8, v. 26, 1959, 353-362. 144289 0095.15902 MARTINELLI, E., Modello metrico reale dello spazio proiettivo quaternionale. Ann. Mat. Pura Appl., 49, 1960, 78-89. 1097773 0737.53040 10.1063/1.529347 MC INNES, B., Methods of holonomy theory for Ricci-flat Kiemannian manifolds. J. Math. Phys., 32, 1991, 888-896. 1235980 0789.53022 10.1063/1.530327 MC INNES, B., Complex symplectic geometry and compact locally hyper-Kählerian manifolds. J. Math. Phys., 34, 1993, 4857-4871. 1645783 0946.53019 ORNEA, L. - PICCINNI, P., Weyl Structures on Quaternionic Manifolds. Proc. Meeting on Quaternionic Structures in Math, and Phys., held in SISSA, Sept. 1994, Lab. Int. SISSA, 6, 1996, 261-266. 1348155 0865.53038 10.1090/S0002-9947-97-01591-2 ORNEA, L. - PICCINNI, P., Locally conformal Kähler structures in quaternionic geometry. Trans. Am. Math. Soc., 349, 1997, 641-655. 0912.53017 ORNEA, L. - PICCINNI, P., Compact Hyperhermitian Weyl and quaternion Hermitian Weyl manifolds. Preprint Dip. Mat. «G. Castelnuovo», Univ. «La Sapienza», Roma, n. 14, 1997. 1249377 0788.53039 10.1016/0926-2245(93)90009-P PEDERSEN, H. - POON, Y. S. - SWANN, A., The Einstein-Weyl equations in complex and quaternionic geometry. Diff. Geom. Appl., 3, 1993, 99-113. 0906.53025 PICCINNI, P., The Geometry of positive locally quaternion Kähler manifolds. Preprint Dip. Mat. «G. Castelnuovo», Univ. «La Sapienza», Roma, n. 26, 1997. 1279015 0797.53037 10.1016/0926-2245(94)00012-3 PONTECORVO, M., Complex structures on quaternionic manifolds. Diff. Geom. Appl., 4, 1994, 163-177. SCOTT, P., The geometry of 3-manifolds. Bull. London Math. Soc., 15, 1983, 401-487. 690671 0506.53032 10.1007/BF00148231 VAISMAN, I., Generalized Hopf manifolds. Geom. Dedicata, 13, 1982, 231-255.
oai:bdim.eu:RLIN_1993_9_4_4_243_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1993_9_4_4_243_0 Some perturbation results for non-linear problems Alcuni risultati di perturbazione per problemi non-lineari Carminati Carlo 1993 12 4 RLIN_1993_9_4 9 4 RLIN_1993_9_4_4 243 250 1269614 0799.58063 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

We discuss the existence of closed geodesic on a Riemannian manifold and the existence of periodic solution of second order Hamiltonian systems.

Viene discussa l'esistenza di geodetiche chiuse su una varietà Riemanniana compatta e l'esistenza di moti periodici per sistemi Hamiltoniani del second'ordine.

Critical point theory Closed geodesies Second order Hamiltonian systems provider bdim
113234 0094.08202 ALBER, S. I., On periodicity problems in the calculus of variations in the large. Amer. Math. Soc. Transl., (2), 14, 1960. 0766.49006 AMBROSETTI, A., Critical points and non-linear variational problems. Supplément Bull. Soc. Math, de France, n. 49, 120, 1992. 0811.70015 AMBROSETTI, A. - BENCI, V. - LONG, Y., A note on the existence of multiple brake orbits. J.N.A.-T.M.A., to appear. 879691 0606.58043 10.1016/0022-0396(87)90144-6 AMBROSETTI, A. - COTI ZELATI, V. - EKELAND, I., Symmetry breaking in Hamiltonian systems. J. Diff. Equat., 67, 1987, 165-184. 996075 0674.34034 BENCI, V. - GIANNONI, F., A New Proof of the Existence of a Brake Orbit. Advanced Topics in the Theory of Dynamical Systems, Academic Press, New York 1990. 592293 0449.70014 10.2307/1971148 EKELAND, I. - LASRY, J. M., On the number of periodic trajectories for a Hamiltonian flow on a convex energy surface. Ann. of Math., 112, 1980, 283-319. 478069 0397.58018 KLINGENBERG, W., Lectures on Closed Geodesics. Springer, 1978. 433481 0203.14501 SCHWARTZ, J. T., Nonlinear functional Analysis. Gordon & Breach, New York 1969. 1078018 0746.49010 STRUWE, M., Variational Methods. Springer, 1990. 980596 0642.58030 10.1007/BF01446433 SZULKIN, A., An index theory and existence of multiple brake orbits for star-shaped hamiltonian systems. Math. Ann., 283, 1989, 241-255.
oai:bdim.eu:RLIN_1992_9_3_2_75_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1992_9_3_2_75_0 Dependence of fractional powers of elliptic operators on boundary conditions Dipendenza di potenze frazionarie di operatori dalle condizioni al contorno Sobolevskii Pavel E. 1992 6 3 RLIN_1992_9_3 9 2 RLIN_1992_9_3_2 75 78 1170205 0794.35041 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

The realization of an elliptic operator A under suitable boundary conditions is considered and the dependence of the square-root of A from the various conditions is studied.

Viene considerata la realizzazione di un operatore ellittico A sotto opportune condizioni al contorno e viene studiata la dipendenza della radice quadrata di A dalle diverse condizioni.

Elliptic operators Fractional powers of operators Resolvent function provider bdim
385645 0312.47041 KRASNOSELSKII, M. A. et al, Integral operators in spaces of summable functions. Noordhoff International Publishing, Groningen 1976. 510056 0224.35029 SEELEY, R., Fraction powers of boundary problems. Actes Cong. Math., Nice, vol. 2, 1970, 795-801. 226444 0165.47602 SOBOLEVSKII, P. E., Comparison theorems for fractional powers of operators. Soviet Math. Dokl., vol. 8, n. 3, 1967, 25-28. 87853 0065.08503 MIRANDA, C., Equazioni alle derivate parziali di tipo ellittico. Springer Verlag, 1955.
oai:bdim.eu:RLIN_2005_9_16_3_197_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2005_9_16_3_197_0 Local order at arbitrary distances in finite-dimensional spin-glass models Ordine locale a distanze arbitrarie nei modelli di vetri di spin in dimensione finita Contucci Pierluigi Unguendoli Francesco 2005 9 16 RLIN_2005_9_16 9 3 RLIN_2005_9_16_3 197 202 2227743 1115.82016 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

For a finite dimensional spin-glass model we prove low temperature local order i.e. the property of concentration of the overlap distribution close to the value 1. The theorem hold for both local observables and for products of observables at arbitrary mutual distance: when the Hamiltonian includes the Edwards-Anderson interaction we prove bond local order, when it includes the random-field interaction we prove site local order.

Per un modello di vetro di spin a dimensione finita dimostriamo la proprietà di ordine locale a bassa temperatura cioé la concentrazione della distribuzione delle sovrapposizioni intorno al valore 1. Il risultato dimostrato vale per osservabili locali e per loro prodotti a distanze arbitrarie. Quando l'Hamiltoniana include l'interazione di Edwards-Anderson proviamo l'ordine locale per lo spin di primo vicino, quando include l'interazione a campo aleatorio proviamo l'ordine locale per lo spin di sito.

Spin-glasses Local order Overlap distribution provider bdim
1026102 0992.82500 MEZARD, M. - PARISI, G. - VIRASORO, M.A., Spin glass theory and beyond. World Scien., 1987. FISHER, D.S. - HUSE, D.H., Ordered Phase of Short-Range Ising Spin-Glasses. Phys. Rev. Lett., 56, 1986, 1601-1604. NEWMNAN, C.M. - STEIN, D.L., Ordering and broken symmetry in short-ranged spin glasses. J. Phys.: Condens. Matter, 15, 2003, R1319-R1364; http://arxiv.org/abs/cond-mat/0301403. EDWARDS, S.F. - ANDERSON, P.W., Theory of spin glasses. J. Phys. F., 5, May 1975, 965-974. 1120141 0747.58066 ZEGARLINSKI, B., Interactions and pressure functionals for disordered lattice systems. Comm. Math. Phys., 139, 1991, 305-339. 289084 0177.57301 RUELLE, D., Statistical Mechanics, Rigorous Results. W.A. Benjamin, New York 1969. 2070108 1157.82337 10.1023/B:JOSS.0000019812.03696.b7 CONTUCCI, P. - GRAFFI, S., Monotonicity and Thermodynamic Limit for Short Range Disordered Models. J. Stat. Phys., 115, Nos. 1/2, 2004, 581-589. 180274 SCHULTZ, T.D. - MATTIS, D.C. - LIEB, E.H., Two-Dimensional Ising Model as a Soluble Problem of Many Fermions. Rev. Mod. Phys., 36, 1964, 856-871. 1405193 1229.82097 10.1142/S0217979296000751 GUERRA, F., About the Overlap Distribution in Mean Field Spin Glass Mod. Int. Jou. Mod. Phys. B, 10, 1997, 1675-1684. NEWMNAN, C.M. - STEIN, D.L., Multiple states and thermodynamic limits in short-ranged Ising spin-glass models. Phys. Rev. B, 46, 1992, 973-982.
oai:bdim.eu:RLIN_1998_9_9_2_101_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1998_9_9_2_101_0 Straightening cell decompositions of cusped hyperbolic 3-manifolds Raddrizzamento di decomposizione di 3-varietà iperboliche con cuspidi Pescini Marina 1998 6 9 RLIN_1998_9_9 9 2 RLIN_1998_9_9_2 101 109 1677258 0927.57012 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Let \( M \) M be an oriented cusped hyperbolic 3-manifold and let \( \tau \) τ be a topological ideal triangulation of \( M \) M . We give a characterization for \( \tau \) τ to be isotopic to an ideal geodesic triangulation; moreover we give a characterization for \( \tau \) τ to flatten into a partially flat triangulation. Finally we prove that straightening combinatorially equivalent topological ideal cell decompositions gives the same geodesic decomposition, up to isometry.

In questo articolo studiamo le condizioni necessarie e sufficienti affinché una triangolazione topologica di una 3-varietà orientata iperbolica con cuspidi possa essere raddrizzata in modo da fornire una triangolazione geodetica ideale con tetraedri eventualmente piatti. Inoltre proviamo che raddrizzando decomposizioni topologiche ideali combinatoriamente equivalenti si ottiene la stessa cellularizzazione geodetica a meno di isometria.

Hyperbolic 3-manifolds Flat triangulations Ideal cell decompositions provider bdim
1219310 0768.51018 10.1007/978-3-642-58158-8 Benedetti, R. - Petronio, C., Lectures on Hyperbolic Geometry. Universitext, Springer-Verlag, Berlin-New York, 1992. 918457 0611.53036 Epstein, D. B. A. - Penner, R. C., Euclidean Decompositions of Noncompact Hyperbolic Manifolds. Journal Differential Geometry, 27, 1988, 67-80. Petronio, C., Some remarks about straightening. Lectures given at Forschungsinstitut für Mathematik, ETH, Zürich, January 1994. 624833 0567.58015 Sullivan, D., On the Ergodic Theory at Infinity of an Arbitrary Discrete Group of Hyperbolic Motions. In: I. Kra - B. Maskit (eds.), Riemann Surfaces and Related Topics. Ann. of Math. Studies, 97, Princeton Univ. Press, Princeton, NJ, 1981, 465-496.
oai:bdim.eu:RLIN_1994_9_5_3_247_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1994_9_5_3_247_0 On control problems of minimum time for Lagrangian systems similar to a swing. I. Convexity criteria for sets Su problemi di controllo di tempo minimo per sistemi Lagrangiani simili a un'altalena. I. Criteri di convessità per insiemi Bressan Aldo Motta Monica 1994 9 5 RLIN_1994_9_5 9 3 RLIN_1994_9_5_3 247 254 1298268 0814.70019 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

One establishes some convexity criteria for sets in \( R^{2} \) R 2 . They will be applied in a further Note to treat the existence of solutions to minimum time problems for certain Lagrangian systems referred to two coordinates, one of which is used as a control. These problems regard the swing or the ski.

Si stabiliscono dei criteri di convessità per insiemi in \( R^{2} \) R 2 . Essi verranno applicati in una prossima Nota per trattare l'esistenza di soluzioni di problemi di tempo minimo per certi insiemi meccanici riferiti a due coordinate, una delle quali è usata come controllo. Tali problemi riguardano l'altalena o lo sci.

Analytical mechanics Lagrangian systems Control theory provider bdim
934514 BRESSAN, ALBERTO, On differential systems with impulsive controls. Rend. Sem. Mat. Univ. Padova, 78, 1987, 227-236. 1131450 0793.49014 10.1007/BF00940040 BRESSAN, ALBERTO - RAMPAZZO, F., Impulsive control systems with commutative vector fields. Journal of optimization theory and applications, 71, 1991, 67-83. 999841 0669.70029 BRESSAN, ALDO, On the application of control theory to certain problems for Lagrangian systems, and hyperimpulsive motion for these. I. Some general mathematical considerations on controllizable parameters. Atti Acc. Lincei Rend, fis., s. 8, v. 82, 1988, 91-105. 999842 0669.70030 BRESSAN, ALDO, On control theory and its applications to certain problems for Lagrangian systems. On hyper-impulsive motions for these. II. Some purely mathematical considerations for hyper-impulsive motions. Applications to Lagrangian systems. Atti Acc. Lincei Rend, fis., s. 8, v. 82, 1988, 107-118. 1163634 BRESSAN, ALDO, Hyper-impulsive motions and controllizable coordinates for Lagrangian systems. Atti Acc. Lincei Mem. fis., s. 8, v. 19, sez. I, fasc. 7 (1989), 1990, 195-246. 1119158 0744.49017 BRESSAN, ALDO, On some control problems concerning the ski or the swing. Mem. Mat. Acc. Lincei, s. 9, v. 1, 1991, 147-196. 1152638 0784.70025 BRESSAN, ALDO - FAVRETTI, M., On motions with bursting characters for Lagrangian mechanical systems with a scalar control. I. Existence of a wide class of Lagrangian systems capable of motions with bursting characters. Rend. Mat. Acc. Lincei, s. 9, v. 2, 1991, 339-343. 1159997 0799.70009 BRESSAN, ALDO - FAVRETTI, M., On motions with bursting characters for Lagrangian mechanical systems with a scalar control. II. A geodesic property of motions with bursting characters for Lagrangian systems. Rend. Mat. Acc. Lincei, s. 9, v. 3, 1992, 35-42. 1271190 0816.70019 BRESSAN, ALDO - MOTTA, M., A class of mechanical systems with some coordinates as controls. A reduction of certain optimization problems for them. Solutions methods. Mem. Mat. Acc. Lincei, s. 9, v. 2, 1993, 5-30. 1273635 0810.93039 BRESSAN, ALDO - MOTTA, M., Some optimization problems with a monotone impulsive character. Approximation by means of structural discontinuities. Mem. Mat. Acc. Lincei, s. 9, v. 2, 1994, 31-52. BRESSAN, ALDO - MOTTA, M., Some optimization problems for the ski simple because of structural discontinuities. Preprint. 1354223 0858.70012 BRESSAN, ALDO - MOTTA, M., Structural discontinuities to approximate some optimization problems with a nonmonotone impulsive character. Preprint. 1360156 0882.70021 BRESSAN, ALDO - MOTTA, M., On minimum time problems for a pendulum with variable length and a conjecture based on a law of Galilei. Atti Istituto Veneto di Scienze Lettere ed Arti. To appear. 1237965 0783.70020 FAVRETTI, M., Essential character of the assumptions of a theorem of Aldo Bressan on the coordinates of a Lagrangian system that are fit for jumps. Atti Istituto Veneto di Scienze Lettere ed Arti, 149, 1991, 1-14. 1237966 0795.70019 FAVRETTI, M., Some bounds for the solutions of certain families of Cauchy problems connected with bursting phenomena. Atti Istituto Veneto di Scienze Lettere ed Arti, 149, 1991, 61-75. 220537 0159.13201 LEE, E. B. - MARKUS, L., Foundations of Optimal Control Theory. SIAM series in Applied Mathematics, John Wiley & Sons, Inc., New York-London-Sidney 1977. 1139816 0758.70013 RAMPAZZO, F., On Lagrangian systems with some coordinates as controls. Atti Acc. Lincei Rend, fis., s. 8, v. 82, 1988, 685-695.
oai:bdim.eu:RLIN_2001_9_12_3_191_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2001_9_12_3_191_0 The apparent propagation velocity of a wave La velocità di propagazione apparente di un’onda Villaggio Piero 2001 9 12 RLIN_2001_9_12 9 3 RLIN_2001_9_12_3 191 197 1898460 1170.80320 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

A one-dimensional model is proposed for determing the delay by which a wave reaching a certain point is effectively registered by a measuring instrument.

Si propone un modello monodimensionale per determinare il ritardo con cui un’onda che raggiunge un certo punto è effettivamente registrata da uno strumento di misura.

Waves Reflection Diffraction provider bdim
1175584 0756.35035 10.1007/BF02844459 Fichera, G., Is the Fourier theory of heat propagation paradoxical? Rend. Circ. Mat. Palermo., vol. 41, 1992, 1-28. Lamb, H., Hydrodinamics. University Press, Cambridge 1932. 1898459 1170.80315 Manacorda, T., Alcuni commenti su di un lavoro di Gaetano Fichera. Rend. Mat. Acc. Lincei, s. 9, v. 12, 2001, 185-189. Rothe, R. - Szabó, I., Höhere Mathematik. Teubner, Stuttgart 1958. Weinberger, H.F., A First Course in Partial Differential Equations. Blaisdell, Waltham, Mass. 1965.
oai:bdim.eu:RLIN_1992_9_3_1_5_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1992_9_3_1_5_0 Cohomology of tensor product of quantum planes Coomologia del prodotto tensoriale di piani quantistici Papi Paolo 1992 3 3 RLIN_1992_9_3 9 1 RLIN_1992_9_3_1 5 13 1159994 0776.17020 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

We consider the Lie algebra of inner derivations of the \( n \) n -fold tensor product of Manin quantum planes and compute its second cohomology group with trivial coefficients.

Viene considerata l'algebra di Lie delle derivazioni interne del prodotto tensoriale di \( n \) n piani quantistici alla Manin; di quest'algebra viene calcolato il secondo gruppo di coomologia a coefficienti banali.

Lie algebra Cohomology Non-commutative space provider bdim
0738.17008 DE CONCINI, C. - KAC, V., Representation of quantum groups at roots of 1. In: Operator Algebras, Unitary Representations, Enveloping Algebras and Invariant Theory. Progress in Math., n. 92, Birkhauser, 1991, 471-509. 1280096 0813.17009 10.1080/00927879408825052 KIRKMAN, E. - PROCESI, C. - SMALL, L., A \( q \) q -analog for the Virasoro algebra. Preprint, l, 1990. 1016381 0724.17006 Yu MANIN, , Quantum groups and non-commutative geometry. Les Publ. du Centres de Recherches Math., Université de Montreal, 1988. 949080 0652.16007 10.1112/jlms/s2-38.1.47 J. C. Mc CONNELL, - PETTIT, J. J., Crossed product and multiplicative analog of Weyl algebras. J. London Math. Soc, (2) 38, 1988, 47-55.
oai:bdim.eu:RLIN_1998_9_9_3_213_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1998_9_9_3_213_0 Extension de métriques riemanniennes et type de croissance Extension of Riemannian metrics and growth-type Estensione di metriche riemanniane e tipo di crescenza Grimaldi Renata Maniscalco Ignazia 1998 9 9 RLIN_1998_9_9 9 3 RLIN_1998_9_9_3 213 220 1683009 0941.53036 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Let \( M \) M be a noncompact differentiable manifold and \( V \) V an open proper submanifold endowed with a complete Riemannian metric \( g \) g . We prove that \( g \) g can be extended all over \( M \) M to a complete Riemannian metric \( G \) G having the same growth-type as \( g \) g .

Sia \( M \) M una varietà differenziabile non compatta e sia \( V \) V una sottovarietà propria aperta, dotata di una metrica riemanniana completa \( g \) g . Si mostra come estendere \( g \) g a una metrica completa \( G \) G su \( M \) M con lo stesso tipo di crescenza di \( g \) g .

Riemannian metrics Geodesic balls Volume provider bdim
2229062 10.1017/CBO9780511616822 Chavel, I., Riemannian Geometry. Acad. Press, 1984. 458335 0309.53035 Cheeger, J. - Ebin, D., Comparison theorems in Riemannian Geometry. North-Holland 1975. 1267853 0759.53026 Grimaldi, R., Sur la croissance des métriques \( \mathcal{C}^{\infty} \) C sur \( \mathbb{R}^{2} \) R 2 et \( \mathbb{H}^{2} \) H 2 . Istit. Lombardo Rend. Sc., A 124, 1990, 119-124. 1212209 0774.53023 Grimaldi, R., Construction de métriques riemanniennes avec type de croissance de plus en plus grand. C.R. Acad. Sc. Paris, 316, Sér. I, 1993 585-587. 1362863 0861.53038 10.1016/0926-2245(95)00019-4 Grimaldi, R., On systolic growth-type. Diff. Geom. Appl., 5, 1995, 331-334. 1439984 0871.53029 Grimaldi, R., Sur la croissance des variétés riemanniennes. Analele Stiint. Ovidius Univ. Constanta, Ser. Matem. III, 1995, fasc. 2, 47-54. 1084048 0724.53024 Grimaldi, R. - Pansu, P., Sur le type de croissance des métriques de révolution. C. R. Acad. Sc. Paris, 311, Sér. I, 1990, 889-892. 1151555 0667.53034 Grimaldi, R. - Pansu, P., Sur la croissance du volume dans une classe conforme. Jour. Math. pures et appl., 71, 1992, 1-19. 1286383 0812.53040 10.1007/BF01267872 Grimaldi, R. - Pansu, P., Sur la régularité de la fonction croissance d’une variété riemannienne. Geometriae Dedicata, 50, 1994, 301-307. 1456249 0880.53031 Grimaldi, R. - Pansu, P., Sur le degré de différentiabilité de la fonction croissance en dimension deux. Boll. U.M.I., (7) 11-B, 1997, Suppl. fasc. 2, 25-38. 686042 0516.53046 Gromov, M., Volume and bounded cohomology. Publ. I.H.E.S., 56, 1982, 5-100. 448362 0356.57001 Hirsch, M., Differential Topology. Springer-Verlag, Berlin-Heidelberg 1976.
oai:bdim.eu:RLIN_1991_9_2_1_65_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1991_9_2_1_65_0 Holomorphic isometries of Cartan domains of type one Isometrie olomorfe di domini di Cartan di tipo uno Vesentini Edoardo 1991 3 2 RLIN_1991_9_2 9 1 RLIN_1991_9_2_1 65 72 1120124 0755.32020 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Holomorphic isometries for the Kobayashi metric of a class of Cartan domains are characterized.

Si caratterizzano le isometrie olomorfe per la metrica di Kobayashi di una classe di domini di Cartan.

Cartan domain Kobayashi metric Holomorphic isometry provider bdim
633394 0483.46051 10.1007/BF01811718 FRANZONI, T., The group of holomorphic automorphisms in certain \( J^{*} \) J * -algebras. Ann. Mat. Pura Appl., (4) 127, 1981, 51-66. 563329 0447.46040 FRANZONI, T. - VESENTINI, E., Holomorphic maps and invariant distances. North Holland, Amsterdam-New York-Oxford 1980. 407330 0293.46049 HARRIS, L. A., Bounded symmetric homogeneous domains in infinite dimensional spaces. Lecture notes in mathematics, n. 364, Springer Verlag, Berlin 1974, 13-40. 80771 0066.33003 KLINGEN, H., Diskontinuierliche Gruppen in symmetrischen Räumen. I. II. Math. Ann., 129, 1955, 345-369; 130, 1955, 137-146. 87751 0071.07701 KLINGEN, H., Über die analytischen Abbildungen verallgemeinerter Einheitkreise auf sich. Math. Ann., 132, 1956, 134-144. 8094 0138.31401 SIEGEL, C. L., Symplectic geometry. Amer. J. Math., 65, 1943, 1-86. 922341 0643.32009 10.1007/BFb0078252 VESENTINI, E., Holomorphic families of holomorphic isometries. Lecture notes in mathematics, n. 1277, Springer Verlag, Berlin 1987, 291-302. 1080982 0737.47038 VESENTINI, E., Semigroups on Kreĭn spaces. Mem. Mat. Acc. Lincei, s. 9, v. 1, 1990, 3-29.
oai:bdim.eu:RLIN_1995_9_6_1_29_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1995_9_6_1_29_0 A min-max theorem for multiple integrals of the Calculus of Variations and applications Un teorema di min-max per integrali multipli del Calcolo delle Variazioni Arcoya David Boccardo Lucio 1995 3 6 RLIN_1995_9_6 9 1 RLIN_1995_9_6_1 29 35 1340279 0831.49012 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

In this paper we deal with the existence of critical points for functionals defined on the Sobolev space \( W_{0}^{1,2} (\Omega) \) W 0 1 , 2 Ω by \( J(v) = \int_{\Omega} \mathfrak{I} (x,v,Dv) \, dx \) J v = Ω I x , v , D v d x , \( v \in W_{0}^{1,2} (\Omega) \) v W 0 1 , 2 Ω , where \( \Omega \) Ω is a bounded, open subset of \( \mathbb{R}^{N} \) R N . Since the differentiability can fail even for very simple examples of functionals defined through multiple integrals of Calculus of Variations, we give a suitable version of the Ambrosetti-Rabinowitz Mountain Pass Theorem, which enables us to the study of critical points for functionals which are not differentiable in all directions. Then we present some applications of this theorem to the study of the existence and multiplicity of nonnegative critical points for multiple integrals of the Calculus of Variations.

In questa Nota si studia l'esistenza di punti critici per funzionali definiti nello spazio di Sobolev \( W_{0}^{1,2} (\Omega) \) W 0 1 , 2 Ω da \( J(v) = \int_{\Omega} \mathfrak{I} (x,v,Dv) \, dx \) J v = Ω I x , v , D v d x , \( v \in W_{0}^{1,2} (\Omega) \) v W 0 1 , 2 Ω , dove \( \Omega \) Ω è un aperto limitato di \( \mathbb{R}^{N} \) R N . Esempi molto semplici (e ben noti) di funzionali mostrano che la differenziabilità può mancare anche se la funzione è molto regolare. Questo motiva l'interesse a un teorema astratto di punto critico del tipo di quello di Ambrosetti-Rabinowitz («Mountain Pass Theorem» o «Teorema del cratere») per funzionali che non sono differenziabili in tutte le direzioni. Presentiamo alcune applicazioni di tale teorema allo studio dell'esistenza e della molteplicità di punti critici positivi di integrali multipli del Calcolo delle Variazioni.

Critical points Multiple integrals of Calculus of Variations Quasilinear equations provider bdim
1164129 0766.49006 AMBROSETTI, A., Critical points and nonlinear variational problems. Supplement au Bulletin de la Société Mathématique de France, Mémoire n. 49, 1992. 370183 0273.49063 AMBROSETTI, A. - RABINOWITZ, P. H., Dual variational methods in critical point theory and applications. J. Funct. Anal., 14, 1973, 349-381. 1451146 0849.49004 ARCOYA, D. - BOCCARDO, L., Nontrivial solutions to some nonlinear equations via Minimization. International Conference on Nonlinear P.D.E., Erice (Italy), May 1992, to appear. 1412429 0884.58023 10.1007/BF00379536 ARCOYA, D. - BOCCARDO, L., Critical points for multiple integrals of Calculus of Variations. To appear. 749753 0641.47066 AUBIN, J. P. - EKELAND, I., Applied Nonlinear Analysis. Wiley, Interscience, New York 1984. 1248641 0806.35033 BOCCARDO, L. - GALLOUET, T. - MURAT, F., A unified presentation of two existence results for problems with natural growth. Pitman Research Notes in Mathematics, n. 296, 1993, 127-137. 1127041 0751.58006 10.1002/cpa.3160440808 BRÉZIS, H. - NIRENBERG, L., Remarks on finding critical points. Comm. Pure Appl. Math., XLIV, 1991, 939-963. 526967 0441.49011 10.1090/S0273-0979-1979-14595-6 EKELAND, I., Nonconvex minimization problems. Bull. Amer. Math. Soc. (NS), 1, 1979, 443-474. 990890 1140.49001 DACOROGNA, B., Direct Methods in the Calculus of Variations. Springer-Verlag, 1989. 1019559 DE FIGUEIREDO, D. G., The Ekeland Variational Principle with Applications and Detours. Springer-Verlag, 1989. 0164.13001 LADYZENSKAYA, O. A. - URALCEVA, N. N., Equations aux dérivées partielles de type elliptique. Dunod, Paris 1968. 982267 0676.58017 MAWHIN, I. - WILLEM, M., Critical Point Theory and Hamiltonian Systems. Springer-Verlag, 1989. 202511 1213.49002 MORREY, C. B., Multiple Integrals in the Calculus of Variations. Springer-Verlag, 1966. 845785 0609.58002 RABINOWTTZ, P. H., Minimax methods in critical point theory with applications to differential equations. CBMS Regional Conference Series Math., 65, Amer. Math. Soc., Providence 1986.
oai:bdim.eu:RLIN_1993_9_4_3_181_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1993_9_4_3_181_0 Solution to a problem of Bombieri Soluzione di un problema di Bombieri Granville Andrew 1993 9 4 RLIN_1993_9_4 9 3 RLIN_1993_9_4_3 181 183 1250496 0805.11071 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

We solve a problem of Bombieri, stated in connection with the «prime number theorem» for function fields.

Questa Nota risolve in senso affermativo un problema posto da Bombieri in una recente Nota Lincea, dimostrando che la formula del tipo di Selberg considerata da Bombieri ammette solamente due soluzioni asintotiche.

Distribution of primes Elementary proofs Prime number theorem provider bdim
175885 0121.28201 BOMBIERI, E., Sull'analogo della formula di Selberg nei corpi di funzioni. Atti Acc. Lincei Rend. fis., s. 8, 35, 1963, 252-257. 1083245 0714.11060 BOMBIERI, E., Correction to my paper «Sull'analogo della formula di Selberg nei corpi di funzioni». Rend. Mat. Acc. Lincei, s. 9, 1, 1990, 177-179. 33309 0034.31501 ERDÖS, P., On a tauberian theorem connected with the new proof of the prime number theorem. Jour. Ind. Math. Soc., 13, 1949, 133-147. 1061781 0759.11030 10.2307/2154203 ZHANG, W.-B., Elementary proofs of the abstract prime number theorem for algebraic function fields. Preprint.
oai:bdim.eu:RLIN_1990_9_1_2_111_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1990_9_1_2_111_0 A Gronwall-like inequality and its applications Una disuguaglianza del tipo di Gronwall e sue applicazioni Constantin Adrian 1990 5 1 RLIN_1990_9_1 9 2 RLIN_1990_9_1_2 111 115 1081393 0711.34020 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

A generalized Gronwall-like inequality is established and applied in obtaining a right saturated solution for a class of differential equations and in estimating the solution of an evolution equation for the so called hidden variables.

Si stabilisce una disuguaglianza di tipo Gronwall che si applica a una classe di equazioni differenziali ed a una stima di soluzioni delle equazioni di evoluzione con variabili latenti.

Gronwall inequality Hidden variables Integral equations provider bdim
BOURBAKI, N., Eléments de mathématique. Livre IV, Fonctions d'une variable réelle. Hermann & Ce Editeurs, 1951. 431968 0387.73004 DAY, A. W., Entropy and hidden variables in continuum thermodynamics. Arch. Rational Mech. Anal., 62, 1976, 367-389. 666586 0498.34036 MORRÒ, A., A Gronwall-like Inequality and its Applications to Continuum Thermodynamics. Bollettino UMI, (6) 1-B, 1982, 553-562.
oai:bdim.eu:RLIN_1999_9_10_3_213_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1999_9_10_3_213_0 Sul problema del ritorno all’equilibrio On the return to equilibrium Chung Kai Lai 1999 9 10 RLIN_1999_9_10 9 3 RLIN_1999_9_10_3 213 218 1769158 1008.60015 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Si considera, sul gruppo degli interi, una passeggiata aleatoria uscente dall’origine, i cui passi ammettano due soli possibili valori: uno strettamente negativo, l’altro strettamente positivo. Nel caso particolare in cui il primo di questi valori sia \( -1 \) - 1 , si dà un’espressione esplicita per la legge del primo istante di ritorno nell’origine.

We consider, on the group of integers, a random walk starting from the origin and whose steps admit as possible values exactly two integers, \( a \) a and \( b \) b , with \( a < 0 < b \) a < 0 < b . In the particular case \( a = -1 \) a = - 1 , we give an explicite expression for the law of the first return time to the origin.

Random walk Taboo probabilities Ballot problem provider bdim
65.0545.01 Borel, É., Valeur pratique et philosophie des probabilités. Gauthier-Villars, Paris 1939. 217872 0092.34304 Kai Lai Chung, , Markov chains with stationary transition probabilities. Second edition, Springer-Verlag, Berlin - Heidelberg - New York 1967. 1540520 10.2307/2323740 Guy, R., A pentagonal pot-pourri of perplexing problems, primarily probabilistic. American Mathematical Monthly, 91, 1984, 559-563. 1456729 Takács, L., On the ballot problem. Advances in combinatorial methods and applications. Birkhäuser, Boston 1997.
oai:bdim.eu:RLIN_1990_9_1_3_195_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1990_9_1_3_195_0 Su alcune questioni connesse con il problema di derivata obliqua regolare per le funzioni armoniche On the regular oblique derivative problem for harmonic functions Magenes Enrico 1990 9 1 RLIN_1990_9_1 9 3 RLIN_1990_9_1_3 195 202 1083248 0732.31005 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

— Vengono riconsiderati il problema di derivata obliqua regolare e quello misto di Dirichlet-derivata obliqua regolare per le funzioni armoniche in un dominio di \( \mathbb{R}^{3} \) R 3 e le questioni di completezza hilbertiana connesse già studiate in un precedente lavoro e viene data una nuova dimostrazione di un teorema di unicità.

Regular oblique derivative problem and mixed Dirichlet-regular oblique derivative problem for the harmonic functions in a domain of \( \mathbb{R}^{3} \) R 3 and the related \( L^{2} \) L 2 completeness questions, already studied in a previous paper, are again considered and a new proof of a uniqueness theorem is given.

Partial differential equations Harmonic function Regular oblique derivative problem provider bdim
21207 0034.20202 AMERIO, L., Sul calcolo delle soluzioni dei problemi al contorno per le equazioni lineari del secondo ordine di tipo ellittico. Amer. Jour. of Math., t. 69, 1947, 447-489. 0012.16605 61.1263.01 BOULIGAND, G. - GIRAUD, G. - DELENS, P., Le problème de la dérivée oblique en théorie du potentiel. Act. Sci. Ind., Hermann, Paris 1935. CIALDEA, A., Sul problema della derivata obliqua per le funzioni armoniche e questioni connesse. Memorie di Mat. della Acc. Naz. dei XL, 106°, vol. 12, 1989, 181-200. 29014 0035.34801 FICHERA, G., Teoremi di completezza sulla frontiera di un dominio per taluni sistemi di funzioni. Ann. di Mat. pura e appl., s. 4, t. XXVII, 1948, 1-28. 335 0021.40403 65.1277.02 GIRAUD, G., Nouvelle méthode pour traiter certaines problèmes relatifs aux équations du type elliptique. Jour. de Math. pures et appl., s. IX, t. XVIII, 1939, 111-143. 77766 0066.08501 MAGENES, E., Sul problema di derivata obliqua regolare per le equazioni lineari del secondo ordine di tipo ellittico. Ann. di Mat. pura e appi, s. 4, t. XL, 1955, 143-160. 27429 MIHLIN, S.G., Singular integral equations. Uspehi Mat. Nausk., (N.S.), 3, n.3 (25), 1948, 29-112. Trad, inglese nella «Translations» dell'Amer. Mat. Soc, n. 24. 284700 0198.14101 MIRANDA, C., Partial differential equations of elliptic type. 2nd revised edition, Springer, Berlin 1970. 11996 0016.21401 63.1352.01 OSEEN, C.W., Contributions à la théorie analitique des marées. Arkiv for Mat. Astr. Fys., b. 25 A. n.24, 1937, 1-39. 5359 0031.01204 PICONE, M., Appunti di Analisi Superiore. Rondinella, Napoli 1940. 22016 0029.29504 PICONE, M., Sulla traduzione in equazione integrale lineare di prima specie dei problemi al contorno concernenti i sistemi di equazioni lineari a derivate parziali. Atti Acc. Lincei Rend. fis., s. 8, vol. 2, fasc. 4, 1947, 365-371.
oai:bdim.eu:RLIN_2001_9_12_2_75_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2001_9_12_2_75_0 Pseudo Laguerre and pseudo Hermite polynomials Pseudo polinomi di Hermite e Laguerre Dattoli Giuseppe 2001 6 12 RLIN_2001_9_12 9 2 RLIN_2001_9_12_2 75 84 1898451 1170.33300 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

We start from pseudo hyperbolic and trigonometric functions to introduce pseudo Laguerre and Hermite polynomials. We discuss the link with families of Bessel functions and analyze all the associated problems from a unifying point of view, employing operational tools.

Si utilizzano le funzioni pseudo trigonometriche e pseudo iperboliche per introdurre pseudo polinomi di Hermite e Laguerre. Si discute il legame con le famiglie di funzioni di Bessel e si analizzano le relative problematiche da un punto di vista unitario che utilizza metodi operazionali.

Hermite polynomials Laguerre polynomials Operator provider bdim
0423.33008 Ricci, P.E., Le funzioni pseudo iperboliche e pseudo trigonometriche. Pubblicazione dell’Istituto di Matematica Applicata, n. 192, 1978. 1018.33003 Dattoli, G. - Torre, A., Theory and applications of generalized Bessel functions. Aracne, Roma 1996. 1734597 1098.33501 Dattoli, G. - Torre, A., Operational methods and two-variable Laguerre polynomials. Atti Accademia di Torino, 132, 1998, 1-7. 779819 0920.33001 Andrews, L.C., Special functions for engineers and applied mathematicians. MacMillan, New York 1985. 1705737 0949.33005 10.1016/S0377-0427(99)00111-9 Dattoli, G. - Lorenzutta, S. - Mancho, A.M. - Torre, A., Generalized polynomials and associated operational identities. J. Comp. Appl. Math., 108, 1999, 209-218. 1020.33500 Nieto, M.N. - Truax, D.R., Arbitrary order Hermite generating functions for obtaining higher-order coherent and squeezed states. Phys. Lett., A208, 1995, 8-16. 1624648 Dattoli, G. - Torre, A., Generalized generating functions. Nuovo Cimento, 113B, 1998, 271-273. 214825 0156.07401 Konhauser, J.D.E., Biorthogonal polynomials suggested by the Laguerre polynomials. Pacific J. Math., 21, 1967, 303-314. 1820846 1060.30503 Ben Cheikh, Y., Decomposition of some complex functions with respect to the cyclic group of order $n$ n . Appl. Math. Infor., 4, 2000. 1662683 0930.33003 10.1016/S0377-0427(98)00145-9 Ben Cheikh, Y., Decomposition of Laguerre polynomials with respect to the cyclic group of order $n$ n . J. Comp. Appl. Math., 99, 1998, 55-66. Dattoli, G. - Srivastava, H.M. - Cesarano, C., On a new family of Laguerre polynomials. Atti Accademia di Torino, submitted. 308482 0197.34102 Srivastava, H.M. - Singhal, J.P., A class of polynomials defined by generalized Rodriguez formula. Ann. Math. Pur. Appl., 90, 1971, 75-85. W.B. Colson - G. Pellegrini A. Renieri (eds.), Laser handbook. Vol. 6, North Holland, Amsterdam 1990.
oai:bdim.eu:RLIN_1990_9_1_1_11_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1990_9_1_1_11_0 An existence result for minimal spheres in manifolds boundary Un risultato di esistenza per sfere minimali in varietà con bordo Rosset Edi 1990 2 1 RLIN_1990_9_1 9 1 RLIN_1990_9_1_1 11 15 1081820 0703.58014 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

We prove the existence of a not homotopically trivial minimal sphere in a 3-manifold with boundary, obtained by deleting an open connected subset from a compact Riemannian oriented 3-manifold with boundary, having trivial second homotopy group.

Proviamo l'esistenza di una sfera minimale omotopicamente non banale in una 3-varietà con bordo, ottenuta da una 3-varietà compatta Riemanniana orientata con bordo, avente secondo gruppo di omotopia nullo, eliminando un aperto connesso.

Minimal surface Pull back Hodge *-operator Winding number provider bdim
868739 0608.58016 BRÉZIS, H. - CORON, J. M. - LIEB, E. H., Harmonic maps with defects. Comm. Math. Phys., 107, 1986, 649-705. 1050330 0746.49029 MANCINI, G. - MUSINA, R., Surfaces of minimal area enclosing a given body in \( \mathbb{R}^{3} \) R 3 . Ann. Scuola Norm. Sup. Pisa, Cl. Sci., (4), to appear. 1127008 ROSSET, E., An analytic construction of the winding number for \( W^{1,n-1} \) W 1 , n - 1 maps from \( S^{n-1} \) S n - 1 to n-manifolds with boundary, preprint. 604040 0462.58014 10.2307/1971131 SACKS, J. - UHLENBECK, K., The existence of minimal immersions of 2-spheres. Ann. of Math., (2), 113, 1981, 1-24.
oai:bdim.eu:RLIN_1990_9_1_2_93_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1990_9_1_2_93_0 Sopra i gruppi finiti non supersolubili a sottogruppi normali e quozienti propri supersolubili On finite nonsupersoluble groups in which all proper normal subgroups and proper quotients are supersoluble Morales Rodríguez Juan 1990 5 1 RLIN_1990_9_1 9 2 RLIN_1990_9_1_2 93 96 1081389 0728.20014 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

In questa nota si studiano i gruppi finiti non supersolubili che hanno un solo sottogruppo normale massimale, e per cui ogni sottogruppo normale proprio e ogni immagine epimorfica propria è supersolubile.

In this paper we study finite non supersoluble groups which have only one normal maximal subgroup and in which every proper normal subgroup and every proper epimorphic image is supersoluble.

Finite groups Supersoluble groups Normal subgroups Epimorphic images provider bdim
863493 0599.20030 MORALES RODRIGUEZ, J., Sopra alcune classi di gruppi minimali non-P. Atti Acc. Lincei Rend. fis., s. 8, vol. 76, fasc. 6, 1984, 334-338.
oai:bdim.eu:RLIN_2002_9_13_2_85_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2002_9_13_2_85_0 Nekhoroshev stability for the D’Alembert problem of Celestial Mechanics Stabilità di Nekhoroshev per il problema di D’Alembert della meccanica celeste Biasco Luca Chierchia Luigi 2002 6 13 RLIN_2002_9_13 9 2 RLIN_2002_9_13_2 85 89 1949481 1072.37061 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

The classical D’Alembert Hamiltonian model for a rotational oblate planet revolving near a «day-year» resonance around a fixed star on a Keplerian ellipse is considered. Notwithstanding the strong degeneracies of the model, stability results a là Nekhoroshev (i.e. for times which are exponentially long in the perturbative parameters) for the angular momentum of the planet hold.

Si considera il classico modello hamiltoniano di D’Alembert per un pianeta ruotante e schiacciato ai poli orbitante, vicino ad una risonanza «giorno-anno», attorno ad una stella fissa su un’ellisse kepleriana. Nonostante la forte degenerazione del modello, si provano risultati di stabilità alla Nekhoroshev (cioé per tempi che sono esponenzialmente lunghi nei parametri perturbativi) per il momento angolare del pianeta.

D’Alembert model Nekhoroshev estimates Spin-orbit resonances Exponential stability provider bdim
923953 0623.00023 10.1007/978-3-642-61551-1 V.I. Arnold (ed.), Encyclopaedia of Mathematical Sciences. Dynamical Systems III, Springer-Verlag, 3, 1988. 1032.37039 Biasco, L. - Chierchia, L., On the stability of some properly-degenerate Hamiltonian systems. Discrete and Continuous Dynamical Systems, series A, to appear. 1956525 1083.70014 10.1023/A:1020151319725 Biasco, L. - Chierchia, L., Effective Hamiltonian for the D’Alembert planetary model near a spin/orbit resonance. To appear. 1095.37027 Biasco, L. - Chierchia, L. - Treschev, D., Total stability of properly-degenerate Hamiltonian systems with two degrees-of-freedom. Preprint 2001. 1259103 1010.37039 Chierchia, L. - Gallavotti, G., Drift and diffusion in phase space. Ann. Inst. Henri Poincaré, Phys. Théor., 60, 1994, 1-144. Erratum, Ann. Inst. Henri Poincaré, Phys. Théor., 68, n. 1, 135, 1998. 30.0834.08 Poincaré, H., Les Méthodes Nouvelles de la Méchanique Céleste. Gauthier Villars, Paris 1892.
oai:bdim.eu:RLIN_2005_9_16_3_181_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2005_9_16_3_181_0 One-dimensional problem for heat and mass transport in oil-wax solution Un problema mono-dimensionale per il trasporto di calore e di massa in petroli ricchi di cera Gianni Roberto Petrova Anna G. 2005 9 16 RLIN_2005_9_16 9 3 RLIN_2005_9_16_3 181 196 2227742 1225.35259 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

A mathematical model of heat and mass transport in non-isothermal partially saturated oil-wax solution was formulated by A. Fasano and M. Primicerio [1]. This paper is devoted to the study of a one-dimensional problem in the framework of that model. The existence of classical solutions in a small time interval is proved, based on the application of a fixed-point theorem to the constructed operator. The technique employed is close to the one of [3] and [4].

Un modello per il trasporto di calore e di massa in idrocarburi pesanti, parzialmente saturi è stato a suo tempo proposto da A. Fasano and M. Primicerio in [1]. Questo articolo è dedicato allo studio di un problema evolutivo mono-dimensionale (costituito da un problema a frontiera libera per un sistema accoppiato di equazioni paraboliche) sviluppato nel contesto di tale modello. Viene dimostrata l'esistenza e l'unicità, in un piccolo intervallo di tempo, di una soluzione. La dimostrazione è ottenuta utilizzando il teorema delle contrazioni applicato ad un opportuno operatore.

Free boundary problems Parabolic equations Oil-wax solution Wax segregation provider bdim
2163965 1088.76068 FASANO, A. - PRIMICERIO, M., Heat and mass transport in non-isothermal partially saturated oil-wax solution. In: P. FERGOLA - F. CAPONE - M. GENTILE - G. GUERRIERO (eds.), New Trends In Mathematical Physics: In honour of the Salvatore Rionero 70th Birthday. Proceedings of the International meeting (Naples, Italy, 24-25 January 2003), 34, (11). 1078.76006 FASANO, A. - FUSI, L. - CORRERA, S., Mathematical models for waxy crude oils. Meccanica, 39, 2004, 441-482. PETROVA, A.G., Local in time solvability for thermodiffusion Stefan problem. Dinamika sploshnoi sredi, 64, Novosibirsk 1984 (in Russian). 714939 0511.35088 FASANO, A. - PRIMICERIO, M., Classical solution of general two-phase parabolic free boundary problem in one dimension. In: Free boundary problems: theory and applications (Montecatini, 1981), Vol. II. Res. Nothes Math. n. 79, Pitman, London 1983, 644-657. 241822 0174.15403 LADYZENSKAYA, O.A. - SOLONNIKOV, V.A. - URALCEVA, N.N., Linear and quasilinear equations of parabolic type. Translations Am. Math. Soc., vol. 23, Providence, RI, 1968. 73828 0206.40402 LOPATINSKI, J.B., On a method for reducing boundary problems for systems of differential equations of elliptic type to regular integral equations. Ukrain. Z., 5, 1953, 123-151 (in Russian) MR 17, 494.
oai:bdim.eu:RLIN_1990_9_1_2_125_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1990_9_1_2_125_0 Holomorphic automorphism groups in certain compact operator spaces Gruppi di automorfismi olomorfi in certi spazi di operatori compatti Petronio Carlo 1990 5 1 RLIN_1990_9_1 9 2 RLIN_1990_9_1_2 125 130 1081395 0738.47031 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

A class of Banach spaces of compact operators in Hilbert spaces is introduced, and the holomorphic automorphism groups of the unit balls of these spaces are investigated.

Viene introdotta una classe di spazi di Banach di operatori compatti tra spazi di Hilbert e viene indagato il gruppo degli automorfismi olomorfi delle palle unitarie corrispondenti.

Compact operator Unit ball Isometry Non-homogeneity provider bdim
633394 0483.46051 10.1007/BF01811718 FRANZONI, T., The group of holomorphic automorphisms in certain J*-algebras. Ann. di Mat. Pura e Appl. (IV), 127, 1981, 31-66. 563329 0447.46040 FRANZONI, T. - VESENTINI, E., Holomorphic Maps and Invariant Distances. North - Holland Math. Studies, 69, 1980. 208368 0144.38704 HALMOS, P. R., A Hilbert space problem book. Van Nostrand Company Inc., 1967. 407330 0293.46049 HARRIS, L. A., Bounded symmetric homogeneous domains in infinite dimensional spaces. Lecture Notes in Mathematics, 364, Berlin-Heidelberg-New York, Springer 1973, 13-40. 422704 0337.32012 KAUP, W. - UPMEIER, H., Banach spaces with biholomorphically equivalent unit balls are isomorphic. Proc. Amer. Math. Soc, 58, 1976, 129-133. 225140 MCCARTHY, C. A., \( c_{p} \) c p . Israel J. Math., 5, 1967, 249-271. PETRONIO, C., Variazioni su un tema di Thullen: domini limitati non omogenei in spazi diBanach. (Tesi di laurea) Università degli Studi di Pisa, A.A. 1988/89. 36935 0041.43502 SCHATTEN, R., A theory of cross-spaces. Princeton University Press, 1950. 119112 0090.09402 SCHATTEN, R., Norm ideals of completely continuous operators. Ergebn. der Math., 27, Springer-Verlag, 1960 555432 0432.58006 STACHO, L. L., A short proof of the fact that biholomorphic automorphisms of the unit ball in certain \( L^{p} \) L p spaces are linear. Acta Sci. Math., 41, 1979, 381-383. 0443.32016 VESENTINI, E., Automorphisms of the unit hall. In: Several Complex Variables. Cortona, 1976/77. Scuola Normale Superiore, Pisa 1978, 282-284. 529475 0413.46039 VESENTINI, E., Variations on a theme of Carathéodory. Ann. Scuola Norm. Sup. Pisa, (4), 6, 1979, 39-68.
oai:bdim.eu:RLIN_2003_9_14_3_247_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2003_9_14_3_247_0 Some Liouville theorems for PDE problems in periodic media Caffarelli Luis 2003 9 14 RLIN_2003_9_14 9 3 RLIN_2003_9_14_3 247 256 2064271 1225.49040 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Liouville problems in periodic media (i.e. the study of properties of global solutions to PDE) arise both in homogenization and dynamical systems. We discuss some recent results for minimal surfaces and free boundaries.

Periodic Media Liouville Homogenization provider bdim
oai:bdim.eu:RLIN_1997_9_8_2_101_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1997_9_8_2_101_0 Characterization of the domain of an elliptic operator of infinitely many variables in \( L^{2}(\mu) \) L 2 μ spaces Caratterizzazione del dominio di un operatore ellittico con infinite variabili in spazi \( L^{2}(\mu) \) L 2 μ Da Prato Giuseppe 1997 7 8 RLIN_1997_9_8 9 2 RLIN_1997_9_8_2 101 105 1485321 0899.47035 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

We consider an elliptic operator associated to a Dirichlet form corresponding to a differential stochastic equation of potential form. We characterize the domain of the operator as a subspace of \( W^{2,2} (\mu) \) W 2 , 2 μ , where \( mu \) m u is the invariant measure of the differential stochastic equation.

Si considera un operatore ellittico associato alla forma di Dirichlet corrispondente a un'equazione differenziale stocastica di tipo potenziale. Si caratterizza il dominio dell'operatore come un sottospazio di \( W^{2,2} (\mu) \) W 2 , 2 μ , dove \( \mu \) μ è la misura invariante dell'equazione differenziale stocastica.

Elliptic equations Kolmogorov equations Dirichlet forms provider bdim
1602247 0897.60070 DA PRATO, G., Perturbations of Ornstein-Uhlenbeck semigroups. Preprint Scuola Normale Superiore n. 39, Pisa 1996; Rendiconti del Seminario Matematico di Trieste, to appear. DA PRATO, G., Regularity results for Kolmogorov equations in \( L^{2} (H,\mu) \) L 2 H , μ spaces and applications. Preprint Scuola Normale Superiore n. 40, Pisa 1996; Ukrainian Mathematical Journal, to appear. 1417491 0761.60052 10.1017/CBO9780511662829 DA PRATO, G. - ZABCZYK, J., Ergodicity for infinite dimensions. Encyclopedia of Mathematics and its Applications, Cambridge University Press, 1996. 1389786 0890.35030 10.1090/S0002-9947-97-01802-3 LUNARDI, A., On the Ornstein-Uhlenbeck operator in \( L^{2} \) L 2 spaces with respect to invariant measures. Preprint Scuola Normale Superiore, Pisa 1995; Trans. Amer. Math. Soc., to appear. 1214375 0826.31001 10.1007/978-3-642-77739-4 MA, Z. M. - ROCKNER, M., Introduction to the theory of (non symmetric) Dirichlet forms. Springer-Verlag, 1992.
oai:bdim.eu:RLIN_2000_9_11_4_245_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2000_9_11_4_245_0 General and physically privileged solutions to certain symmetric systems of linear P.D.E.s with tensor functionals as unknowns Soluzione generale e soluzioni fisicamente privilegiate di sistemi simmetrici di equazioni lineari alle derivate parziali aventi come incognite funzionali tensoriali Montanaro Adriano Pigozzi Diego 2000 12 11 RLIN_2000_9_11 9 4 RLIN_2000_9_11_4 245 276 1837582 1020.74003 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

We characterize the general solutions to certain symmetric systems of linear partial differential equations with tensor functionals as unknowns. Then we determine the solutions that are physically meaningful in suitable senses related with the constitutive functionals of two simple thermodynamic bodies with fading memory that are globally equivalent, i.e. roughly speaking that behave in the same way along processes not involving cuts. The domains of the constitutive functionals are nowhere dense subsets of a suitable infinite-dimensional Hilbert space. By using the condition of material frame-indifference on the constitutive functionals and the theory [1] of differential calculus on convex sets (that may be nowhere dense), we give a rigorous meaning from a general point of view to the derivatives of these functionals, without assuming the possibility of extending them to an open set. Such results appear necessary for characterizing the couples of thermodynamic bodies with memory that are globally equivalent but are physically different; and such bodies exist.

Si caratterizza la soluzione generale di certi sistemi simmetrici di equazioni lineari alle derivate parziali aventi funzionali tensoriali come incognite. Quindi si determinano le soluzioni fisicamente significative in certi sensi collegati con i funzionali costitutivi di due corpi termodinamici con memoria evanescente che sono globalmente equivalenti, ossia che si comportano allo stesso modo nei processi non involgenti tagli. I domini dei funzionali costitutivi sono sottoinsiemi ovunque non densi di un opportuno spazio di Hilbert a infinite dimensioni. Usando la condizione di indifferenza materiale per i funzionali costitutivi e la teoria [1] di calcolo differenziale su un insieme convesso (che pu` o essere ovunque non denso), viene dato un significato rigoroso, da un punto di vista generale, alle derivate di questi funzionali, senza assumere la possibilità di estenderli a qualche insieme aperto. Tali risultati sembrano necessari per caratterizzare le coppie di corpi termodinamici con memoria che sono globalmente equivalenti ma fisicamente diversi; e tali corpi esistono.

Linear partial differential equations Tensor functionals Symmetric linear systems provider bdim
1469382 0904.46031 10.1006/jmaa.1997.5498 Montanaro, A. - Pigozzi, D., A note about differentiability of maps defined on convex subsets of Banach spaces that may be nowhere dense. J. Math. Anal. Appl., 213, 1997, 370-386. 171419 0286.73006 Coleman, B.D., Thermodynamics of Materials with Memory. Arch. Rational Mech. Anal., 17, 1964, 1-46. 1657111 0916.73008 10.1007/s002050050110 Montanaro, A., Global equivalence for deformable thermoelastic bodies. Arch. Rational Mech. Anal., 143, 1998, 375-400. 1243957 0796.35020 10.1007/BF01759323 Montanaro, A. - Pigozzi, D., On a large class of symmetric systems of linear PDEs for tensor functions useful in mathematical physics. Annali Mat. Pura Appl., CLXIV, 1993, 259-273. 210344 0171.47201 Mizel, V.J. - Wang, C.-C., A fading memory hypothesis which suffices for chain rules. Arch. Rational Mech. Anal., 23, 1966, 124-134. 559731 0866.73001 Truesdell, C., A First Course in Rational Continuum Mechanics. Academic Press, New York-San Francisco-London 1977. 0005.18102 58.0808.04 Caldonazzo, B., Osservazione sui tensori quintupli emisotropi. Rend. Fis. Acc. Lincei, s. 6, vol. 15, 1932, 840-843.
oai:bdim.eu:RLIN_2005_9_16_2_109_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2005_9_16_2_109_0 Quasi-periodic oscillations for wave equations under periodic forcing Oscillazioni quasi periodiche per equazioni delle onde con forzante periodica Berti Massimiliano Procesi Michela 2005 6 16 RLIN_2005_9_16 9 2 RLIN_2005_9_16_2 109 116 2225504 1225.35146 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Existence of quasi-periodic solutions with two frequencies of completely resonant, periodically forced, nonlinear wave equations with periodic spatial boundary conditions is established. We consider both the cases the forcing frequency is (Case A) a rational number and (Case B) an irrational number.

Si dimostra l'esistenza di soluzioni quasi periodiche con due frequenze per una classe di equazioni delle onde non lineari completamente risonanti aventi un termine forzante periodico. Consideriamo che la frequenza forzante sia un numero razionale (Caso A), sia irrazionale (Caso B).

Nonlinear wave equation Quasi-periodic solutions Variational methods Lyapunov-Schmidt reduction Infinite dimensional Hamiltonian systems provider bdim
1614571 1004.37043 10.1016/S0294-1449(97)89300-6 AMBROSETTI, A. - BADIALE, M., Homoclinics: Poincaré-Melnikov type results via a variational method. Annales I.H.P. - Analyse nonlin., v. 15, n. 2, 1998, 233-252. 2176924 1105.37045 10.1137/S0036141003436107 BAMBUSI, D. - BERTI, M., A Birkhoof-Lewis type theorem for some Hamiltonian PDE's. SIAM Journal on Mathematical Analysis, to appear. 537061 0465.49006 10.1007/BF01389883 BENCI, V. - RABINOWITZ, P., Critical point theorems for indefinite functionals. Invent. Math., 52, n. 3, 1979, 241-273. 2225505 1225.35147 BERTI, M. - BIASCO, L., Periodic solutions of nonlinear wave equations with non-monotone forcing terms. Rend. Mat. Acc. Lincei, s. 9, v. 16, 2005, 117-124. 2021909 1072.35015 10.1007/s00220-003-0972-8 BERTI, M. - BOLLE, P., Periodic solutions of nonlinear wave equations with general nonlinearities. Comm. Math. Phys., 243, n. 2, 2003, 315-328. 1103.35077 BERTI, M. - BOLLE, P., Cantor families of periodic solutions for completely resonant non linear wave equations. Preprint SISSA 2004. 2233048 1100.35011 10.1080/03605300500358129 BERTI, M. - PROCESI, M., Quasi-periodic solutions of completely resonant forced wave equations. Preprint SISSA. 965608 PLOTINIKOV, P.I. - YUNGERMANN, L.N., Periodic solutions of a weakly nonlinear wave equation with an irrational relation of period to interval length. Transl. in Diff. Eq., 24, n. 9, 1988, 1059-1065. 2152330 1086.35007 10.3934/dcds.2005.13.541 PROCESI, M., Quasi-periodic solutions for completely resonant wave equations in 1D and 2D. Discr. Cont. Dyn. Syst., 13(3), August 2005, 541-552. 206507 0152.10003 RABINOWITZ, P., Periodic solutions of nonlinear hyperbolic partial differential equations. Comm. Pure Appl. Math., 20, 1967, 145-205.
oai:bdim.eu:RLIN_2004_9_15_3-4_183_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2004_9_15_3-4_183_0 Existence and approximation results for gradient flows Rossi Riccarda Savaré Giuseppe 2004 12 15 RLIN_2004_9_15 9 3-4 RLIN_2004_9_15_3-4 183 196 2148878 1162.34343 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

This note addresses the Cauchy problem for the gradient flow equation in a Hilbert space $H$ $$ \begin{cases} u^{\prime}(t) + \partial \phi(u(t)) \ni 0 \quad \text{a.e. in} \, (0,T),\\ u(0) = u_{0}, \end{cases} $$ where $\phi : H \rightarrow (-\infty , +\infty \,]$ is a proper, lower semicontinuous functional which is not supposed to be a (smooth perturbation of a) convex functional and $\partial \phi$ is (a suitable limiting version of) its subdifferential. The interest for this kind of equations is motivated by a number of examples, which show that several mathematical models describing phase transitions phenomena and leading to systems of evolutionary PDEs have a \textit{common gradient flow structure}. In particular, when quasi-stationary models are considered, highly non-convex functionals naturally arise. We will present some existence results for the solution of the gradient flow equation by exploiting a variational \textit{approximation} technique, featuring some ideas from the theory of \textit{Minimizing Movements}.

Phase transitions Evolution problems Gradient flows Minimizing Movements provider bdim
1205983 0783.35002 10.1137/0331020 ALMGREN, F. - TAYLOR, J.E. - WANG, L., Curvature-driven flows: a variational approach. SIAM J. Control Optim., 31, n. 2, 1993, 387-438. 1387558 0957.49029 AMBROSIO, L., Minimizing Movements. Rend. Accad. Naz. Sci. XL Mem. Mat. Appl., 19, n. 5, 1995, 191-246. AMBROSIO, L. - GIGLI, N. - SAVARÉ, G., Gradient Flows. Lecture Notes in Mathematics ETH Zürich, Birkhäuser, Basel. To appear. 1034002 0677.65068 BAIOCCHI, C., Discretization of evolution variational inequalities. In: F. COLOMBINI - A. MARINO - L. MODICA - S. SPAGNOLO (eds.), Partial differential equations and the calculus of variations. Vol I, Birkäuser, Boston 1989, 59-62. 969314 0698.34014 10.2307/2047434 BRESSAN, A. - CELLINA, A. - COLOMBO, G., Upper semicontinuous differential inclusions without convexity. Proc. Amer. Math. Soc., 106, n. 3, 1989, 771-775. 273468 0231.47034 BREZIS, H., On some degenerate nonlinear parabolic equations. Nonlinear Functional Analysis (Proc. Sympos. Pure Math., Vol. XVIII, Part 1, Chicago, Ill., 1968), Amer. Math. Soc., Providence, R.I., 1970, 28-38. 394323 0278.47033 BREZIS, H., Monotonicity methods in Hilbert spaces and some applications to nonlinear partial differential equations. Nonlinear Functional Analysis, Proc. Sympos. Math. Res. Center, Univ. Wisconsin, Madison 1971, Academic Press, New York 1971, 101-156. 348562 0252.47055 BREZIS, H., Opérateurs maximaux monotones et semi-groupes de contractions dans les espaces de Hilbert. North-Holland Math. Stud., No. 5, North-Holland, Amsterdam 1973. 816623 0608.35080 10.1007/BF00254827 CAGINALP, G., An analysis of a phase field model of a free boundary. Arch. Rational Mech. Anal., 92, 1986, 205-245. 998924 1027.80505 10.1103/PhysRevA.39.5887 CAGINALP, G., Stefan and Hele-Shaw type models as asymptotic limits of the phase-field equations. Phys. Rev. A (3), 39, n. 11, 1989, 5887-5896. 287357 0226.47038 CRANDALL, M.G. - LIGGETT, T.M., Generation of semigroups of nonlinear transformations on general Banach spaces. Amer. J. Math., 93, 1971, 265-298. 243383 0182.18903 CRANDALL, M.G. - PAZY, A., Semigroups of nonlinear contractions and dissipative sets. J. Functional Analysis, 3, 1969, 376-418. 636814 0465.47041 DE GIORGI, E. - MARINO, A. - TOSQUES, M., Problemi di evoluzione in spazi metrici e curve di massima pendenza. Atti Acc. Lincei Rend. fis., s. 8, v. 68, 1980, 180-187. 1260440 0851.35052 DE GIORGI, E., New problems on minimizing movements. In: C. BAIOCCHI - J.-L. LIONS (eds.), Boundary Value Problems for PDE and Applications. Masson, 1993, 81-98. 1617171 0915.35120 10.1137/S0036141096303359 JORDAN, R. - KINDERLEHRER, D. - Otto, F., The variational formulation of the Fokker-Planck equation. SIAM J. Math. Anal., 29, n. 1, 1998, 1-17. 216342 0163.38302 KOMURA, Y., Nonlinear semi-groups in Hilbert space. J. Math. Soc. Japan, 19, 1967, 493-507. 1897379 1012.74054 10.1007/s002050200194 LEVITAS, V.I. - MIELKE, A. - THEIL, F., A variational formulation of rate-independent phase transformations using an extremum principle. Arch. Ration. Mech. Anal., 162, n. 2, 2002, 137-177. 1117346 0734.35159 10.1017/S0956792500000103 LUCKHAUS, S., Solutions for the two-phase Stefan problem with the Gibbs-Thomson law for the melting temperature. European J. Appl. Math., 1, n. 2, 1990, 101-111. 1041899 0699.49015 MARINO, A. - SACCON, C. - TOSQUES, M., Curves of maximal slope and parabolic variational inequalities on nonconvex constraints. Ann. Scuola Norm. Sup. Pisa Cl. Sci. (4), 16, n. 2, 1989, 281-330. 866718 0616.76004 10.1007/BF00251230 MODICA, L., Gradient theory of phase transitions and minimal interface criterion. Arch. Rational Mech. Anal., 98, 1986, 123-142. 445362 0356.49008 MODICA, L. - MORTOLA, S., Un esempio di $\Gamma$ Γ -convergenza. Boll. Un. Mat. Ital. B, 14, 1977, 285-299. 1737503 1021.65047 10.1002/(SICI)1097-0312(200005)53:5&lt;525::AID-CPA1&gt;3.0.CO;2-M NOCHETTO, R. - SAVARÉ, G. - VERDI, C., A posteriori error estimates for variable time-step discretizations of nonlinear evolution equations. Comm. Pure Appl. Math., 53, n. 5, 2000, 525-589. 1236334 0802.35165 PLOTNIKOV, P.I. - STAROVOITOV, V.N., The Stefan problem with surface tension as the limit of a phase field model. Differential Equations, 29, 1993, 395-404. 1116.34048 ROSSI, R. - SAVARÉ, G., Gradient flows of non convex functionals in Hilbert spaces and applications. Preprint IMATI-CNR, n. 7-PV, 2004, 1-45. 1377244 0855.65102 10.1137/0733005 RULLA, J., Error analysis for implicit approximations to solutions to Cauchy problems. SIAM J. Numer. Anal., 33, n. 1, 1996, 68-87. 1411975 0858.35073 SAVARÉ, G., Weak solutions and maximal regularity for abstract evolution inequalities. Adv. Math. Sci. Appl., 6, n. 2, 1996, 377-418. 1751714 0963.35188 10.1006/jdeq.1999.3679 SCHÄTZLE, R., The quasistationary phase field equations with Neumann boundary conditions. J. Differential Equations, 162, n. 2, 2000, 473-503. 804824 0585.35053 10.1093/imamat/34.3.225 VISINTIN, A., Stefan problem with phase relaxation. IMA J. Appl. Math., 34, n. 3, 1985, 225-245. 1423808 0882.35004 10.1007/978-1-4612-4078-5 VISINTIN, A., Models of Phase Transitions. Birkhäuser, Boston 1996.
oai:bdim.eu:RLIN_1991_9_2_4_339_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1991_9_2_4_339_0 On motions with bursting characters for Lagrangian mechanical systems with a scalar control. I. Existence of a wide class of Lagrangian systems capable of motions with bursting characters Sui moti per sistemi Lagrangiani con controllo scalare, aventi caratteri di scoppio. I. Esistenza di una vasta classe di sistemi Lagrangiani capaci di moti con caratteri di scoppio Bressan Aldo Favretti Marco 1991 12 2 RLIN_1991_9_2 9 4 RLIN_1991_9_2_4 339 343 1152638 0784.70025 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

In this Note (which will be followed by a second) we consider a Lagrangian system \( \Sigma \) Σ (possibly without any Lagrangian function) referred to \( N + 1 \) N + 1 coordinates \( q_{1} \cdots , q_{N} \) q 1 , q N , \( u \) u , with \( u \) u to be used as a control, and precisely to add to \( \Sigma \) Σ a frictionless constraint of the type \( u = u(t)\) u = u t . Let \( \Sigma \) Σ 's (frictionless) constraints be represented by the manifold \( V_{t} \) V t generally moving in Hertz's space. We also consider an instant \( d \) d (to be used for certain limit discontinuity-properties), a point \( (\bar{q},\bar{u}) \) q ¯ , u ¯ of \( V_{d} \) V d , a value \( \bar{p} \) p ¯ for \( \Sigma \) Σ 's momentum conjugate to \( q \) q , and a continuous control \( v(\cdot) \) v ( ) with \( v(d) = \bar{u} \) v d = u ¯ . Furthermore zero is assumed not to equal a certain quantity determined by \( \Sigma \) Σ 's kinetic energy and \( \Sigma \) Σ 's applied forces, which forces are assumed to be at most linear in \( \dot{u} \) u ˙ . A purely mathematical work of Favretti allows us to quickly show that (i) \( v(\cdot) \) v ( ) is the \( C^{0} \) C 0 -limit of a sequence \( u_{a}(\cdot) \) u a ( ) of continuous controls that have a jump character in some interval \(\left[ d, d+ \eta_{a} \right] \) d , d + η a and satisfy certain conditions including that both \( \eta_{a} \to 0^{+} \) η a 0 + and \( u_{a} (d+\eta_{a}) \to u_{a}(d)= v(d) \) u a d + η a u a d = v d as \( a \to \infty \) a . Furthermore on the basis of that work we quickly prove that (ii) for every choice of the above sequence \( u_{a} (\cdot) \) u a ( ) , calling \( \Sigma_{a} \) Σ a the system \( \Sigma \) Σ added with the frictionless constraint \( u = u_{a}(t) \) u = u a t and assuming \( (\bar{q},\bar{p}) \) q ¯ , p ¯ to be \( \Sigma_{a} \) Σ a 's state at \( t = d \) t = d , along \( \Sigma_{a} \) Σ a 's subsequent motion we have that \( q(t) \in B(\bar{q}, 1/a) \) q t B q ¯ , 1 / a \( \forall t \in \left[ d,d+\eta_{a} \right] \) t d , d + η a and \( \dot{q}(d +\eta_{a})>a \) q ˙ d + η a > a . Thus, for values of \( a(\in \mathbb{N}) \) a N large enough, \( \Sigma_{a} \) Σ a 's motion has bursting characters.

In questa Nota (cui farà seguito una seconda) si considera un sistema Lagrangiano \( \Sigma \) Σ (eventualmente privo di Lagrangiano) riferito a \( N + 1 \) N + 1 coordinate \( q_{1} \cdots , q_{N} \) q 1 , q N , \( u \) u , con \( u \) u da usarsi come controllo e precisamente per aggiungere a \( \Sigma \) Σ un vincolo liscio del tipo \( u = u(t)\) u = u t . I vincoli (lisci) di \( \Sigma \) Σ siano rappresentati nello spazio di Hertz dalla varietà \( V_{t} \) V t (generalmente mobile). Si considera pure un istante \( d \) d (da usarsi per certe «proprietà di discontinuità al limite»), un punto \( (\bar{q},\bar{u}) \) q ¯ , u ¯ di \( V_{d} \) V d , un valore \( \bar{p} \) p ¯ per il momento di \( \Sigma \) Σ coniugato a \( q \) q , e infine un controllo continuo \( v(\cdot) \) v ( ) con \( v(d) = \bar{u} \) v d = u ¯ . Inoltre si suppone \( \neq 0 \) 0 una certa quantità determinata dall'energia cinetica e dalle forze attive di \( \Sigma \) Σ , queste forze essendo supposte al più lineari in \( \dot{u} \) u ˙ . Un lavoro puramente matematico di Favretti ci permette di mostrare rapidamente che (i) \( v(\cdot) \) v ( ) è il limite in \( C^{0} \) C 0 di una sequenza \( u_{a}(\cdot) \) u a ( ) di controlli continui che hanno carattere di salto e salto \( j_{a} \) j a \( (= u_{a}(d+ \eta_{a}) — \bar{u}) \) = u a d + η a u ¯ in qualche intervallo \( [d,d+\eta_{a}] \) d , d + η a e inoltre soddisfano certe condizioni, tra le quali che si abbia: \( \eta_{a} \to 0^{+} \) η a 0 + , \( j_{a} \to 0 \) j a 0 e \( u_{a} (d+\eta_{a}) \to u_{a}(d)= v(d) \) u a d + η a u a d = v d . Inoltre sulla base di quel lavoro dimostriamo rapidamente che (ii) per ogni scelta della suddetta sequenza \( u_{a} (\cdot) \) u a ( ) , detto \( \Sigma_{a} \) Σ a il sistema \( \Sigma \) Σ soggetto all'addizionale vincolo liscio \( u = u_{a}(t) \) u = u a t e supposto che a \( t = d \) t = d \( \Sigma_{a} \) Σ a sia nello stato \( (\bar{q},\bar{p}) \) q ¯ , p ¯ , lungo il susseguente moto di \( \Sigma_{a} \) Σ a si ha che \( q(t) \in B(\bar{q}, 1/a) \) q t B q ¯ , 1 / a \( \forall t \in \left[ d,d+\eta_{a} \right] \) t d , d + η a e \( \dot{q}(d +\eta_{a})>a \) q ˙ d + η a > a . Così, per valori di \( a(\in \mathbb{N}) \) a N abbastanza alti, il moto di \( \Sigma_{a} \) Σ a ha carattere di scoppio.

Lagrangian systems Feedback theory Bursts provider bdim
934514 BRESSAN, ALBERTO, On differential systems with impulsive controls. Sem. Mat. Univ. Padova, 78, 1987, 227-235. 999841 0669.70029 BRESSAN, ALDO, On the application of Control Theory to certain problems for Lagrangian systems, and hyper-impulsive motions for these. I. Some general mathematical considerations on controllizable parameters. Atti Acc. Lincei Rend. fis., s. 8, vol. 82, 1988, 91-105. 999842 0669.70030 BRESSAN, ALDO, On control theory and its applications to certain problems for Lagrangian systems. On hyper-impulsive Applications motions for these. II. Some purely mathematical considerations for hyper-impulsive motions. Applications to Lagrangian systems. Atti Acc. Lincei Rend. fis., s. 8, vol. 82, 1988, 107-118. 1151699 0721.70021 BRESSAN, ALDO, On control theory and its applications to certain problems for Lagrangian systems. On hyper-impulsive motions for these. III. Strengthening of the characterizations performed in parts I and II, for Lagrangian systems. An invariance property. Atti Acc. Lincei Rend. fis., s. 8, vol. 82, 1988, 461-471. 1163634 BRESSAN, ALDO, Hyper-impulsive motions and controllizable coordinates for Lagrangian systems. Atti Acc. Lincei Mem. fis., s. 8, vol. 19, sez. 1, fasc. 7, 1989, 197-245. 1237965 0783.70020 FAVRETTI, M., Essential character of the assumptions of a theorem of Aldo Bressan on the coordinates of a Lagrangian systems that are fit for jumps. Atti Istituto Veneto di Scienze Lettere ed Arti, to appear. 1237966 0795.70019 FAVRETTI, M., Some bounds for the solutions of certain families of Cauchy problems connected with bursting phenomena. Atti Istituto Veneto di Scienze Lettere ed Arti, to appear.
oai:bdim.eu:RLIN_1992_9_3_1_35_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1992_9_3_1_35_0 On motions with bursting characters for Lagrangian mechanical systems with a scalar control. II. A geodesic property of motions with bursting characters for Lagrangian systems Sui moti per sistemi Lagrangiani con controllo scalare, aventi caratteri di scoppio. II. Una proprietà geodetica di certi moti per sistemi Lagrangiani con caratteri di scoppio Bressan Aldo Favretti Marco 1992 3 3 RLIN_1992_9_3 9 1 RLIN_1992_9_3_1 35 42 1159997 0799.70009 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

This Note is the continuation of a previous paper with the same title. Here (Part II) we show that for every choice of the sequence \( u_{a}(\cdot) \) u a ( ) , \( \Sigma_{a}\) Σ a 's trajectory \( l_{a} \) l a after the instant \( d + \eta{a} \) d + η a tends in a certain natural sense, as \( a \to \infty \) a , to a certain geodesic \( l \) l of \( V_{d} \) V d , with origin at \( (\bar{q},\bar{u}) \) q ¯ , u ¯ . Incidentally \( l \) l is independent of the choice of applied forces in a neighbourhood of \( (\bar{q},\bar{u}) \) q ¯ , u ¯ arbitrarily prefixed.

In questa Nota, che è la Parte II di una precedente Nota dallo stesso titolo si mostra che, per ogni scelta della suddetta successione \( u_{a}(\cdot) \) u a ( ) , la traiettoria \( l_{a} \) l a di \( \Sigma_{a}\) Σ a dopo \( d + \eta{a} \) d + η a tende in un certo senso naturale, per \( a \to \infty \) a , a una certa geodetica \( l \) l della varietà \( V_{d} \) V d , uscente dal punto \( (\bar{q},\bar{u}) \) q ¯ , u ¯ . Tra l'altro la \( l \) l è indipendente dalla scelta delle forze attive in un intorno di \( (\bar{q},\bar{u}) \) q ¯ , u ¯ comunque prefissato.

Lagrangian systems Feedback theory Bursts provider bdim
oai:bdim.eu:RLIN_1994_9_5_2_197_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1994_9_5_2_197_0 On fixed points of holomorphic maps of simply connected proper domains in \( C \) C Punti fissi di funzioni olomorfe Tauraso Roberto 1994 6 5 RLIN_1994_9_5 9 2 RLIN_1994_9_5_2 197 202 1292576 0816.30029 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

A criterion for the existence of fixed point of one-dimensional holomorphic maps is established.

Si stabilisce un criterio di esistenza di punto fisso per funzioni olomorfe di un dominio proprio, semplicemente connesso di \( C \) C .

Fixed point Holomorphic map Wolff point provider bdim
1098711 0747.32002 ABATE, M., Iteration Theory of Holomorphic Maps on Taut Manifolds. Mediterranean Press, Commenda di Rende 1989. 344479 0277.30027 AHERN, P. R. - CLARK, D. N., On inner functions with \( H^{p} \) H p -derivative. Michigan Math. J., vol. 21, 1974, 115-127. 0056.06703 CARATHÉODORY, C., Theory of functions of a Complex Variable. Vol. II, Chelsea Publ. Co., New York 1954. 563329 0447.46040 FRANZONI, T. - VESENTINI, E., Holomorphic Maps and Invariant Distances. North-Holland, Amsterdam 1980. 628971 1106.30001 GARNETT, J. B., Bounded Analytic Functions. Academic Press, New York 1981. 684968 0525.47039 10.1016/0362-546X(82)90107-9 GOEBEL, K., Fixed points and invariant domains of holomorphic mappings of the Hilbert ball. Nonlinear Analysis, vol. 12, 1982, 1327-1334. 133008 0734.46033 HOFFMAN, K., Banach Spaces of Analytic Functions. Prentice-Hall, Inc., Englewood Cliffs, N.J. 1962. 210528 0925.00005 RUDIN, W., Real and Complex Analysis. McGraw-Hill, New York 1966.
oai:bdim.eu:RLIN_1990_9_1_3_223_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1990_9_1_3_223_0 On the mechanical behaviour of laminated curved beams: a simple model which takes into account the warping effects Sul comportamento meccanico di travi curve laminate: un modello semplice che tiene conto degli effetti di ingobbamento Ascione Luigi Fraternali Fernando 1990 9 1 RLIN_1990_9_1 9 3 RLIN_1990_9_1_3 223 233 1083251 0713.73057 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

A mechanical one-dimensional model which describes the dynamical behaviour of laminated curved beams is formulated. It is assumed that each lamina can be regarded as a Timoshenko's beam and that the rotations of the cross sections can differ from one lamina to another. The relative displacements at the interfaces of adjacent laminae are assumed to be zero. Consequently the model includes a shear deformability, due to the warping of the cross beam section consequent to the variability of the laminae rotations, but it is not able to describe the phenomena of the interfacial slip and of the delamination. By means of the principle of virtual work a variational formulation of the motion equations is carried out, which is useful in view of a successive numerical approach. The constitutive assumption at the basis of the analysis carried out is that of an orthotropic linear elastic behaviour in the single lamina.

Sul comportamento meccanico di travi curve laminate: un modello semplice che tiene conto degli effetti di ingobbamento. Si formula un modello meccanico monodimensionale, che descrive il comportamento dinamico di travi curve laminate. Si suppone che ciascuna lamina si comporti come una trave di Timoshenko con rotazioni delle sezioni che possono variare da lamina a lamina. Gli spostamenti relativi all'interfaccia di lamine adiacenti si suppongono nulli. Conseguentemente il modello include una deformabilità tagliante, consentita dall'ingobbamento dovuto alla variabilità delle suddette rotazioni, ma non è in grado di descrivere i fenomeni di scorrimento interfacciale e di delaminazione. Attraverso il principio dei lavori virtuali si sviluppa una formulazione variazionale delle equazioni del moto in vista di un successivo approccio numerico agli elementi finiti. L'ipotesi costitutiva a base dell'analisi svolta è quella di comportamento elastico lineare ortotropo nell'ambito della singola lamina.

Composite materials Curved beams Dynamics Constitutive relations provider bdim
MINDLIN, R. D. - DERESIEWICZ, H., Timoshenko's shear coefficient for flexural vibrations of beams. Technical Report n° 10, ONR Project NR064-388, Dep. Civ. Eng., Columbia University, New York 1953. 0052.42405 GOODMAN, L. E. - SUTHERLAND, J. G., Discussion of paper, Flexural vibrations in uniform beams according to Timoshenko theory, by R. A. Anderson. J. Appl. Mech., 21, 1954, 202-204. 0151.37901 COWPER, G. R., The shear coefficient in Timoshenko's beam. J. Appl. Mech., 33, 1966, 335-340. WHITNEY, J. M., Shear correction factor for orthotropic laminates under static loads. J. Appl. Mech., 40, 1973, 302-304. BHIMARADDI, A. - CARR, A. J. - MOSS, P. J., Generalized finite element analysis of laminated curved beams with constant curvature. Comput. Struct., 31, 1989, 309-317. 0685.73032 YUAN, F. G. - MILLER, R. E., A new finite element for laminated composite beams. Comput. Struct., 31, 1989, 737-745. ASCIONE, L. - FRATERNALI, F., Sulla statica delle travi ad asse curvo. Rep. Inst. Civ. Eng., Univ. of Salerno, n° 17, 1989. 0624.73068 VINSON, J. R. - SIERAKOWSKI, R. L., The behaviour of structures composed of composite materials. Martinus Nijhoff Publishers, Dordrecht 1987.
oai:bdim.eu:RLIN_1990_9_1_1_41_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1990_9_1_1_41_0 Some problems of parabolic type with discontinuous nonlinearities on convex constraints Alcuni problemi di tipo parabolico semilineare con termini non lineari discontinui su vincoli non convessi Frigon Marlène Marino Antonio Saccon Claudio 1990 2 1 RLIN_1990_9_1 9 1 RLIN_1990_9_1_1 41 52 1081825 0705.35074 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

We study semilinear equations and inequalities of parabolic type with discontinuous nonlinearities, possibly subjected to convex or even nonconvex constraint conditions. To prove some existence theorems we regard the solutions as «curves of maximal relaxed slope» for a suitable functional on the given constraint.

Si studiano alcune equazioni e disequazioni di tipo parabolico semilineare con termine non lineare discontinuo, in presenza di condizioni di vincolo anche non convesse. Per ottenere dei teoremi di esistenza si interpretano le soluzioni come «curve di massima pendenza rilassata» per un opportuno funzionale sul vincolo considerato.

Curves of maximal slope Partial differential equations Discontinuity Nonconvex constraints provider bdim
AUBIN, J. P., Domaines de viabilité pour des inclusion différentielles opérationelles. 1986. 755330 0538.34007 10.1007/978-3-642-69512-4 AUBIN, J. P. - CELLINA, A., Differential inclusions. Springer Verlag, 1984. 0252.47055 BREZIS, H., Opérateurs maximaux monotone et semigroupes de contraction dans les espaces de Hilbert. North Holland Mathematics Studies, 5, Notas de Matematica, 50, Amsterdam - London 1973. 709590 0582.49001 CLARKE, F. H., Optimization and nonsmooth analysis. John Wiley, 1984. 0729.35088 CŎBANOV, G. - MARINO, A. - SCOLOZZI, D., Evolution equations for the eigenvalue problem for the Laplace operator with respect to an obstacle. To appear. 1065252 0716.49009 10.1016/0362-546X(90)90157-C CŎBANOV, G. - MARINO, A. - SCOLOZZI, D., Multiplicity of eigenvalues of the Laplace operator with respect to an obstacle and non tangency conditions. Nonlinear Anal. Th. Meth. Appl., to appear. 0752.34013 COLOMBO, G. - TOSQUES, M., Multivalued perturbations for a class of nonlinear evolution equations. Ann. Mat. Pura Appl., to appear. 780801 0597.47045 DE GIORGI, E. - DEGIOVANNI, M. - MARINO, A. - TOSQUES, M., Evolution equations for a class of nonlinear operators. Atti Acc. Lincei Rend. fis., s. 8, vol. 75, 1983, 1-8. 636814 0465.47041 DE GIORGI, E. - MARINO, A. - TOSQUES, M., Problemi di evoluzione in spazi metrici e curve di massima pendenza. Atti Acc. Lincei Rend. fis., s. 8, vol. 68, 1980, 180-187. 993805 0684.73022 DEGIOVANNI, M., On the buckling of a thin elastic plate subjected to unilateral constraints. Nonlinear variational problems. Vol. II, Res. Notes in Math., 193, Pitman, 1989. 999818 0671.58029 DEGIOVANNI, M. - MARINO, A., Nonsmooth variational bifurcation. Atti Acc. Lincei Rend. fis., s. 8, vol. 81, 1987, 259-269. 820649 0545.46029 10.1016/0362-546X(85)90098-7 DEGIOVANNI, M. - MARINO, A. - TOSQUES, M., Evolution equations with lack of convexity. Nonlinear Anal. Th. Meth. Appl., 9, 12, 1985, 1401-1443. 860642 0615.47047 DEGIOVANNI, M. - TOSQUES, M., Evolution equations for \( (\varphi,f) \) φ , f -monotone operators. Boll. Un. Mat. Ital., 5-B, (6), 1986, 537-568. 226364 0183.40403 EDELSTEIN, M., On nearest points of sets in uniformly convex Banach spaces. J. London Math. Soc., 43, 1968, 375-377. 0753.35046 FRIGON, M. - SACCON, C., Heat equations with discontinuous nonlinearities on convex and non convex constraints. To appear. 894076 0621.58005 MARINO, A., Evolution equations and multiplicity of critical points with respect to an obstacle. Contributions to modern calculus of variations (Bologna, 1985), Res. Notes in Math., 148, Pitman, London - New York 1987, 123-144. 1034066 0738.49014 MARINO, A. - SACCON, C., Subdifferential analysis and plates subjected to unilateral constraints. Proceedings of the Congress Nonsmooth optimization and related topics. Erice, 1988, Plenum Publishing, to appear 0699.49015 MARINO, A. - SACCON, C. - TOSQUES, M., Curves of maximal slope and parabolic variation inequalities on non convex constraints. Ann. Scuola Norm. Sup. Pisa, to appear. 698480 MARINO, A. - SCOLOZZI, D., Geodetiche con ostacolo. Boll. Un. Mat. Ital., 2-B, (6), 1983, 1-31. 654928 0495.58012 MARINO, A. - TOSQUES, M., Curves of maximal slope for a certain class of non regular functions. Boll. Un. Mat. Ital., 1-B, (6), 1982, 143-170. 998002 0716.35035 SACCON, C., Some parabolic equations on non convex constraints. Boll. Un. Mat. Ital., 3-B, (7), 1989, 369-386. 849617 0591.47038 SHUZHONG, SHI, Théorèmes de viabilité pour les inclusion aux dérivée partielles. C.R.A.S., 1986. 960638 0654.49016 10.1016/0362-546X(88)90077-6 SHUZHONG, SHI, Nagumo type condition for partial differential inclusions. Nonlinear Anal. Th. Meth. Appl., 12, 1988, 951-967.
oai:bdim.eu:RLIN_1994_9_5_2_167_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1994_9_5_2_167_0 Two-weight Sobolev-Poincaré inequalities and Harnack inequality for a class of degenerate elliptic operators Disuguaglianze di Sobolev-Poincaré con due pesi e disuguaglianza di Hamack per una classe di operatori ellittici degeneri Franchi Bruno Gutiérrez Cristian E. Wheeden Richard L. 1994 6 5 RLIN_1994_9_5 9 2 RLIN_1994_9_5_2 167 175 1292572 0811.46023 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

In this Note we prove a two-weight Sobolev-Poincaré inequality for the function spaces associated with a Grushin type operator. Conditions on the weights are formulated in terms of a strong \( A_{\infty} \)» A weight with respect to the metric associated with the operator. Roughly speaking, the strong \( A_{\infty} \)» A condition provides relationships between line and solid integrals of the weight. Then, this result is applied in order to prove Harnack's inequality for positive weak solutions of some degenerate elliptic equations.

In questa Nota proviamo una disuguaglianza di Sobolev-Poincaré con due pesi per gli spazi funzionali associati ad un operatore tipo Grushin. Le condizioni sui pesi sono formulate in termini di un dato peso fortemente \( A_{\infty} \)» A rispetto a una metrica naturale per l'operatore, dove la condizione \( A_{\infty} \)» A -forte richiede opportune relazioni tra gli integrali di linea e gli integrali solidi del peso. Successivamente, questo risultato è applicato per provare la disuguaglianza di Harnack per le soluzioni deboli positive di certe equazioni ellittiche degeneri.

Weighted Sobolev-Poincaré inequalities Degenerate elliptic equations Harnack inequality provider bdim
982072 0662.46037 10.1007/BFb0081242 BOJARSKE, B., Remarks on Sobolev imbedding inequalities. Complex Analysis, Lecture Notes in Mathematics 1351, Springer, 1989, 52-68. 442579 0341.44007 CALDERON, A. P., Inequalities for the maximal function relative to a metric. Studia Math., 57, 1976, 297-306. 1218266 0797.35063 CAPOGNA, L. - DANIELLI, D. - GAROFALO, N., Embedding theorems and the Harnack inequality for solutions of nonlinear subelliptic equations. C.R. Acad. Sci. Paris, 316, 1993, 809-814. 805809 0575.42026 10.2307/2374351 CHANILLO, S. - WHEEDEN, R. L., Weighted Poincaré and Sobolev inequalities and estimates for the Peano maximal function. Amer. J. Math., 107, 1985, 1191-1226. 847996 0634.35035 10.1080/03605308608820458 CHANILLO, S. - WHEEDEN, R. L., Harnack's inequality and mean-value inequalities for solutions of degenerate elliptic equations. Comm. Partial Differential Equations, 11, 1986, 1111-1134. 0812.46020 CHUA, S., Weighted Sobolev inequality on domains satisfying chain conditions. Proc. Amer. Math. Soc., to appear. 1044784 0752.46014 DAVID, G. - SEMMES, S., Strong \( A_{\infty} \) A weights, Sobolev inequalities and quasiconformal mappings In: C. SADOSKY (éd.), Analysis and Partial Differential Equations. Marcel Dekker, 1990, 101-111. 643158 0498.35042 10.1080/03605308208820218 FABES, E. - KENIG, C. - SERAPIONI, R., The local regularity of solutions of degenerate elliptic equations. Comm. Partial Differential Equations, 7, 1982, 77-116. 1165071 0761.35050 10.4171/RMI/112 FERNANDES, J. C., Mean value and Harnack inequalities for a certain class of degenerate parabolic equations. Revista Matematica Iberoamericana, 7, 1991, 247-286. 730094 0503.35071 FEFFERMAN, C. - PHONG, D. H., Subelliptic eigenvalue problems. In: W. BECKNER et al (eds.), Conference on Harmonic Analysis (Chicago 1980). Wadsworth 1981, 590-606. 1040042 0751.46023 10.2307/2001837 FRANCHI, B., Weighted Sobolev-Poincaré inequalities and pointwise estimates for a class of degenerate elliptic equations. Trans. Amer. Math. Soc., 327, 1991, 125-158. 1071637 0734.46023 FRANCHI, B., Inégalités de Sobolev pour des champs de vecteurs lipschitziens. C.R. Acad. Sci. Paris, 311, 1990, 329-332. 753153 0552.35032 FRANCHI, B. - LANCONELLI, E., Hölder regularity theorem for a class of linear nonuniformly elliptic operators with measurable coefficients. Ann. Scuola Norm. Sup. Pisa, 10, (4), 1983, 523-541. 963489 0685.35046 FRANCHI, B. - SERAPIONI, R., Pointwise estimates for a class of strongly degenerate elliptic operators: a geometrical approach. Ann. Scuola Norm. Sup. Pisa, 14, (4), 1987, 527-568. 1265808 0822.46032 10.1080/03605309408821025 FRANCHI, B. - GUTIERREZ, C. - WHEEDEN, R. L., Weighted Sobolev-Poincaré inequalities for Grushin type operators. Comm. Partial Differential Equations, to appear. 1314734 0830.46027 10.1007/BF01450501 FRANCHI, B. - GALLOT, S. - WHEEDEN, R. L., Sobolev and isoperimetric inequalities for degenerate metrics. Math. Ann., to appear. 1245092 0794.51011 FRANCHI, B. - GALLOT, S. - WHEEDEN, R. L., Inégalités isopérimetriques pour des métriques dégénérées. C.R. Acad. Sci. Paris, Ser. A, 317, 1993, 651-654. 402038 0258.30021 GEHRING, F. W., The \( L^{p} \) L p -integrability of the partial derivatives of a quasi conformai mapping. Acta Math., 130, 1973, 265-277. 1096367 0785.35057 GUTIERREZ, C. - WHEEDEN, R. L., Mean-value and Harnack inequalities for degenerate parabolic equations. Colloq. Math., 60/61, 1990, 157-194. 802488 0588.30023 IWANIEK, T. - NOLDER, C. A., Hardy-Littlewood inequality for quasiregular mappings in certain domains in \( \mathbb{R}^{n} \) R n . Ann. Acad. Sci. Fenn., Series A I Math. 10, 1985, 267-282. 850547 0614.35066 10.1215/S0012-7094-86-05329-9 JERISON, D., The Poincaré inequality for vector fields satisfying Hörmander condition. Duke Math. J., 53, 1986, 503-523. 1286482 0860.35006 10.4171/RMI/158 LU, G., The sharp Poincaré inequality for free vector fields: an endpoint result. Revista Matématica Iberoamericana, to appear. 793239 0578.32044 10.1007/BF02392539 NAGEL, A. - STEIN, E. M. - WAINGER, S., Balls and metrics defined by vector fields I: basic properties. Acta Math., 155, 1985, 103-147. 1165073 0770.35023 10.4171/RMI/114 SALINAS, O., Harnack inequality and Green function for a certain class of degenerate elliptic differential operators. Revista Matematica Iberoamericana, 7, 1991, 313-349. 1175693 0783.42011 10.2307/2374799 SAWYER, E. - WHEEDEN, R. L., Weighted inequalities for fractional integrals on Euclidean and homogeneous spaces. Amer. J. Math., 114, 1992, 813-874.
oai:bdim.eu:RLIN_2003_9_14_1_33_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2003_9_14_1_33_0 On the $G$ G -convergence of Morrey operators Sulla $G$ G -convergenza degli operatori di Morrey Formica Maria Rosaria Sbordone Carlo 2003 3 14 RLIN_2003_9_14 9 1 RLIN_2003_9_14_1 33 49 2057273 1105.35030 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Following Morrey [14] we associate to any measurable symmetric $2 \times 2$ 2 × 2 matrix valued function $A(x)$ A x such that $$\frac{|\xi|^{2}}{K} \le (A(x) \xi,\xi) \le K |\xi|^{2} \quad \text{a.e.} \quad x \in \Omega, \, \forall \xi \in \mathbb{R}^{2},$$ ξ 2 K A x ξ , ξ K ξ 2 a.e. x Ω , ξ R 2 , $\Omega \in \mathbb{R}^{2}$ Ω R 2 and to any $u \in W^{1,2}(\Omega)$ u W 1 , 2 Ω another symmetric $2 \times 2$ 2 × 2 matrix valued function $\mathcal{A} = \mathcal{A}(A,u)$ A = A A , u with $det \, \mathcal{A} = 1$ d e t A = 1 and satisfying $$\frac{|\xi|^{2}}{K} \le (\mathcal{A}(x) \xi,\xi) \le K |\xi|^{2} \quad \text{a.e.} \quad x \in \Omega, \, \forall \xi \in \mathbb{R}^{2},$$ ξ 2 K A x ξ , ξ K ξ 2 a.e. x Ω , ξ R 2 , The crucial property of $\mathcal{A}$ A is that $\mathcal{A} \nabla u = A \nabla u$ A u = A u , if $\nabla u \neq 0$ u 0 . We study the properties of $\mathcal{A}$ A as a function of $A$ A and $u$ u . In particular, we show that, if $A_{b} \rightarrow^{G} A$ A b G A , $u_{b} \rightharpoonup u$ u b u , $\nabla u \neq 0$ u 0 and $div \, A_{b} \nabla u_{b} = 0$ d i v A b u b = 0 then $\mathcal{A} (A_{b},u_{b}) \rightarrow^{G} \mathcal{A} (A, u)$ A ( A b , u b ) G A ( A , u ) .

Seguendo Morrey [14], ad ogni matrice simmetrica $A(x)$ A x a coefficienti misurabili, tale che $$\frac{|\xi|^{2}}{K} \le (A(x) \xi,\xi) \le K |\xi|^{2} \quad \text{a.e.} \quad x \in \Omega, \, \forall \xi \in \mathbb{R}^{2},$$ ξ 2 K A x ξ , ξ K ξ 2 a.e. x Ω , ξ R 2 , $\Omega \in \mathbb{R}^{2}$ Ω R 2 e ad ogni $u \in W^{1,2}(\Omega)$ u W 1 , 2 Ω si può associare un'altra matrice simmetrica $\mathcal{A} = \mathcal{A}(A,u)$ A = A A , u con $det \, \mathcal{A} = 1$ d e t A = 1 e soddisfacente $$\frac{|\xi|^{2}}{K} \le (\mathcal{A}(x) \xi,\xi) \le K |\xi|^{2} \quad \text{a.e.} \quad x \in \Omega, \, \forall \xi \in \mathbb{R}^{2},$$ ξ 2 K A x ξ , ξ K ξ 2 a.e. x Ω , ξ R 2 , La principale proprietà di $\mathcal{A}$ A è che $\mathcal{A} \nabla u = A \nabla u$ A u = A u , se $\nabla u \neq 0$ u 0 . Si studiano le proprietà di $\mathcal{A}$ A come funzione di $A$ A e di $u$ u . In particolare, si dimostra che, se $A_{b} \rightarrow^{G} A$ A b G A , $u_{b} \rightharpoonup u$ u b u , $\nabla u \neq 0$ u 0 and $div \, A_{b} \nabla u_{b} = 0$ d i v A b u b = 0 then $\mathcal{A} (A_{b},u_{b}) \rightarrow^{G} \mathcal{A} (A, u)$ A ( A b , u b ) G A ( A , u ) .

Elliptic equations G-convergence Morrey matrices provider bdim
1922134 1069.35024 CAPONE, C., Quasiharmonic fields and Beltrami operators. Comm. Math. Univ. Carolinae, 43, 2, 2002, 363-377. 227827 0155.17603 DE GIORGI, E., Un esempio di estremali discontinue per un problema variazionale di tipo ellittico. Boll. U.M.I., 1, 1968, 135-137. 917047 0646.30024 DE ARCANGELIS, - DONATO, P., On the convergence of Laplace-Beltrami operators associated to quasiregular mappings. Studia mathematica, t. LXXXVI, 1987, 189-204. 1762427 0955.30016 FORMICA, M.R., On the $\Gamma$ Γ -convergence of Laplace-Beltrami operators in the plane. Annales Academiae Scientiarum Fennicae Matematica, vol. 25, 2000, 423-438. 1053.47510 FORMICA, M.R., Degenerate Elliptic Operators with coefficients in EXP. Ph.D. thesis, Università di Napoli «Federico II», 2001. 1979563 1098.47517 FORMICA, M.R., Beltrami operators in the plane. Preprint n. 6, Aracne editrice, Roma 2002. 926503 0668.73018 10.1017/CBO9780511662911.013 FRANCFORT, G.A. - MURAT, F., Optimal bounds for conduction in two-dimensional, two-phase, anisotropic media. In: R.J. KNOPS - A.A. LACEY (eds.), «Nonclassical» continuum mechanics. London, Math. Soc. Lecture Notes Series, 122, Cambridge 1987, 197-212. 717034 0516.49003 GIAQUINTA, M., Multiple integrals in the calculus of variations and nonlinear elliptic systems. Ann. of Math. Studies, 105, Princeton Univ. Press, 1983. 1916553 1019.35021 10.1081/PDE-120004890 GRECO, L. - SBORDONE, C., Sharp upper bounds for the degree of regularity of the solutions to an elliptic equation. Comm. P.D.E., 27, 5-6, 2002, 945-952. 1849688 1068.30011 10.1016/S0294-1449(00)00058-5 IWANIEC, T. - SBORDONE, C., Quasiharmonic fields. Ann. Inst. H. Poincaré - AN 18, 5, 2001, 519-572. 995699 0691.35024 JOHN, O. - MALY, J. - STARÁ, J., Nowhere continuous solutions to elliptic systems. Comm. Math. Univ. Carolinae, 30, 1, 1989, 33-43. 510669 0413.35033 KOSHELEV, A.I., Regularity of solutions of quasilinear elliptic systems. Russian Math. Survey, 33, 1978, 1-52. MALY, J., Finding equation from solutions. Draft 1999. 64.0460.02 MORREY, C.B., On the solution of quasilinear elliptic partial differential equations. Trans. Amer. Math. Soc., 43, 1938, 126-166. 506997 0399.46022 MURAT, F., Compacité par Compensation. Ann. Sc. Norm. Pisa, 5, 1978, 489-507. 361422 0237.35028 PICCININI, L. - SPAGNOLO, S., On the Hölder Continuity of Solutions of Second Order Elliptic Equations in two Variables. Ann. Sc. Norm. Pisa, 26, 1972, 391-402. 768815 0564.35008 SOUCEK, J., Singular solutions to linear elliptic systems. Comm. Math. Univ. Carolinae, 25, 1984, 273-281. 240443 0174.42101 SPAGNOLO, S., Sulla convergenza di soluzioni di equazioni paraboliche ed ellittiche. Ann. Sc. Norm Sup. Pisa, vol. 22, fasc. 4, 1968, 571-597. 509184 0332.46020 SPAGNOLO, S., Some convergence problems. Symposia Mathematica, XVIII, 1976, 391-397. 0544.47042 TARTAR, L., Homogéneization et compacité par compensation. Cours Peccot, Collège de France, 1977.
oai:bdim.eu:RLIN_1992_9_3_3_173_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1992_9_3_3_173_0 A simple proof of Baer;s and Sato's theorems on lattice-isomorphisms between groups Una semplice dimostrazione dei teoremi di Baer e Sato sugli isomorfismi reticolari tra gruppi Mainardis Mario 1992 9 3 RLIN_1992_9_3 9 3 RLIN_1992_9_3_3 173 176 1186912 0797.20025 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

A simple proof is given of a well-known result of the existance of lattice-isomorphisms between locally nilpotent quaternionfree modular groups and abelian groups.

Si dà una semplice dimostrazione di un noto risultato sull'esistenza di isomorfismi reticolari tra gruppi localmente nilpotenti modulari liberi da quaternioni e gruppi abeliani.

Group Lattice Lattice-isomorphism provider bdim
10589 0061.03601 BAER, R., Crossed isomorphisms. Amer. J. of Math., 66, 1944, 341-404. 5721 0061.02503 IWASAWA, K., Über die endlichen Gruppen und die Verbände ihrer Untergruppen. Journal of Univ. of Tokyo, 4-3, 1941, 171-199. 15118 0061.02504 IWASAWA, K., On the structure of infinite M-groups. Jap. Journal of Math., 18, 1943, 709-728. 1124494 0723.20015 10.1007/BF01198956 MAINARDIS, M., Projektivitäten zwischen abelschen und nichtabehchen Gruppen. Arch. Math., 57, 1991, 332-338. 788942 0545.20017 10.1007/BF01235771 POLAND, J., On verifying lattice-isomorphisms of a group. Arch. Math., 44, 1985, 309-310. 45113 0044.01104 SATO, S., Note on lattice-isomorphisms between abelian groups and non abelian groups. Osaka Math. J., 3, 1951, 215-220.
oai:bdim.eu:RLIN_2005_9_16_3_143_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2005_9_16_3_143_0 On Axiomatic Foundations Common to Classical Physics and Special Relativity Sui fondamenti comuni alla fisica classica e alla relatività ristretta Bressan Aldo 2005 9 16 RLIN_2005_9_16 9 3 RLIN_2005_9_16_3 143 157 2227739 1225.70005 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

(i) The class of the axiomatic foundations mentioned in the title is called Ax Found; and its structure is treated in the introduction. (ii) This consists of Parts A to G followed by the References. (iii) In [17] Bressan's modal logic is treated in a consciously non-rigorous way. Instead here, as well as Ax Found, it has a rigorous treatment. Such a treatment had been appreciated by the mathematical physicist C. Truesdell in [62]. (iv) In 1953 Truesdell had a remarkable intuition, whose correctness appeared only in 1962, from Bressan's monograph [3]. (v) As a foreign member of the Lincei Academy, Truesdell supported some logical features, absent in his school, and he gave M. Pitteri a "confidential copy" involving this fact. (vi) Since thus the present rigorous treatment of Bressan's modal logic appears strongly supported by Truesdell, it was natural to dedicate the present work to his memory. (vii) In the introduction one says to have proved certain results (whose proof does not appear there) concerning rational mechanics or Bressan's modal logic treated rigorously.

(i) La classe dei fondamenti assiomatici menzionati nel titolo è detta brevemente Ax Found; ed è trattata nell'introduzione. (ii) Questa consiste nelle Parts A,...,G seguite dalle References. (iii) In [17] la logica modale di Bressan è trattata in modo consciamente non rigoroso. Invece qui essa, al pari di Ax Found, ha una trattazione rigorosa. Una tale trattazione era stata apprezzata dal fisico matematico Truesdell in [62]. (iv) Nel 1953 Truesdell ebbe una notevole intuizione, la cui correttezza risultò solo nel 1962, dalla monografia [3] di Bressan. (v) Come Socio straniero dei Lincei, Truesdell sostenne degli aspetti logici, assenti nella sua scuola. Inoltre diede a M. Pitteri una "confidential copy" involgente tale fatto. (vi) La presente trattazione rigorosa della logica modale di Bressan appare perciò fortemente sostenuta da Truesdell. Era quindi naturale dedicare alla sua memoria il lavoro inviato. (vii) Nell'introduzione si dice di aver ottenuto certi risultati (la cui dimostrazione non appare ivi) concernenti la Meccanica razionale o la logica modale di Bressan trattata rigorosamente.

Axiomatic Foundations Special Relativity Classical Physics Continuous Media provider bdim
569392 0432.03014 10.2307/2273182 BACON, J., Substance and first-order quantification over individual concepts. J. Symbolic Logic, 45, 1980, 193-203. (={D} Bacon 1980) 822824 0677.03021 BONOTTO, C. - BRESSAN, A., On generalized synonymy notions and corresponding quasi-senses. Atti Acc. Lincei Mem. fis., s. 8, v. 17, 1984, 163-209. (={D} Bonotto & Bressan 1984) 0114.14902 BRESSAN, A., Metodo di assiomatizzazione in senso stretto della meccanica classica. Applicazione di esso ad alcuni problemi di assiomatizzazione non ancora completamente risolti. Rend. Sem. Mat. Univ. Padova, 32, 1962, 55-212. (={D} Met) 401432 0255.02015 BRESSAN, A., A general interpreted modal calculus. Yale University Press, New Haven-London 1972. Foreword by N. D. Belnap, Jr., 327 pp. (={D} GIMC) 0322.02014 BRESSAN, A., On the usefulness of modal logic in the axiomatization of physics. In: K.F. SHAFFNER - R.S. COHEN (eds.), Proceedings of the 1972 biennial meeting of the Philosophy of Science Association, Lansing, Michigan. Reidel Publishing Co., Dordrecht and Boston 1974, 285-303. (={D} Bressan 1974) 604946 BRESSAN, A., (a) On physical possibility and (b) Supplement: a much used notion of physical possibility and Gödel's undecidability theorem. In: M.L. DALLA CHIARA SCABBIA (ed.), Italian Studies in philosophy of Science. North Holland Publishing Co., Amsterdam 1981, 197-210 and 211-214. (={D} Bressan_a 1981) 646464 0476.03028 BRESSAN, A., Extensions of the modal calculi $MC^{v}$ M C v and $MC^{\infty}$ M C . Comparison of them with similar calculi endowed with different semantics. Application to probability theory. In: U. MÖNNICH (ed.), Aspects of philosophical logic, some logical forays into central notions of linguistics and philosophy. Proceedings of a workshop on Formal Semantics of Natural Languages (Tübingen 1977), Synthese Library, v. 147, Reidel Publishing Co., Dordrecht 1981, 21-66. (={D} Bressan_a 1981) 797963 0608.03006 BRESSAN, A., On the interpreted sense calculus $SC^{v}_{a}$ S C a v . In: G. DORN - P. WEINGERTNER (eds.), Foundations of Logic and Linguistics: problems and their solutions. Plenum Publishing Corporation, New York-London 1985, 427-463. (={D} Bressan 1985) 904903 0667.03015 BRESSAN, A., On the logic of senses. An anomalous use of belief sentences, its rigorous and formal treatment. In: Atti degli Incontri di Logica Matematica (Siena 1985, Padova 1985, Siena 1986). Vol. 3, Università di Siena, Siena 1987, 137-165. (={D} Bressan_a 1987) 1006945 0774.73003 BRESSAN, A., Towards axiomatic foundations of the Mach-Painlevé type for classical or relativistic theories of continuous media. Atti Acc. Lincei Mem. fis., s. 8, v. 19, 1987, 1-21. (={D} Bressan_a 1987) 1092891 0726.03008 10.1305/ndjfl/1093635669 BRESSAN, A., New semantics for the extensional but hyper-intensional part $L_{a}$ L a of the modal sense language $SL_{a}$ S L a . Notre Dame J. of Formal Logic, 32, 1991, 47-86. (={D} Bressan 1991) BRESSAN, A.. A semantical theory connected with space-time. In: U. MAYER - H.J. SCHMIDT (eds.), Proceedings of the symposium Semantical aspects of space-time theories (Bielefeld, 1991). Wissenschaftsverlag, Leipzig 1994, 53-65. (={D} Bressan 1994) 1405418 0970.03507 BRESSAN, A., Again on relativistic semantics. Logic and logical philosophy, 3, 1995, 23-36. (={D} Bressan 1995) 1644016 0981.03508 BRESSAN, A., Some answers to Max Urchs' comments to a paper of A. Bressan. Logic and logical philosophy, 4, 1996, 123-131. (={D} Bressan 1996) BRESSAN, A., On the interdisciplinary character of rigorous articles à la Mach-Painlevé (in oral Italian). Conference presented at the Convegno in onore dei 90 anni del prof. Giuseppe Grioli, Padova, Accademia Patavina, April 3-4, 2002. (={D} Bressan 2002) BRESSAN, A., Elimination of the only primitive dynamic notion PrF in Met by means of kinematic notions. (Now it is written only in Italian; and it is likely to be improved and shortened). (={D} ElimPrF) BRESSAN, A. - MONTANARO, A., 1982. (={D} Br&Mont) 45675 0044.25104 BURKS, A.W., The logic of causal propositions. Mind, 60, 1951, 363-383. (={D} Burks 1951) 19563 0034.00106 CARNAP, R., Meaning and necessity. The University of Chicago Press, Chicago, 1956. 1st version 1947. (={D} Carnap 1956) 0083.00104 CARNAP, R., Introduction to symbolic logic. Dover Publications, Inc., New York 1958. German edition 1954. Chicago, 1956. 1st version 1947. (={D} Carnap 1954.) 0114.14902 GARSON, J., Review of A. Bressan's "Metodo di assiomatizzazione in senso stretto della meccanica classica". J. of Symbolic Logic, 38, 1973, 144-145. (={D} Garson 1973) 39.0739.01 HAMEL, G., Über die Grundlagen der Mechanik. Mathematische Annalen, 66, 1908, 340-397. (={D} Hamel 1908) HAMEL, G., Die Axiome der Mechanik. Handbuch der Physick, v. 5, Springer-Verlag, Berlin 1927, 1-42. (={D} Hamel 1927) 55071 0050.18201 MCKINSEY, J.C.C. - SUGAR, A.C. - SUPPES, P., Axiomatic foundations of classical particle mechanics. J. of Rat. Mech. Anal., 2, 1953, 253-272. (={D} MK&S&S 1953) 636630 0485.03006 MONTANARO, A. - BRESSAN, A., Contributions to Foundations of Probability calculus on the basis of the Modal Logical Calculus $MC^{v}$ M C v or $MC^{v*}$ M C v A * . Part 1: Basic theorems of a recent modal version of the Probability Calculus, based on $MC^{v}$ M C v or $MC^{v*}$ M C v A * . Rend. Sem. Mat. Univ. Padova, 64, 1981, 109-126. 653299 0501.03010 MONTANARO, A. - BRESSAN, A., Contributions to Foundations of Probability calculus on the basis of the Modal Logical Calculus $MC^{v}$ M C v or $MC^{v*}$ M C v A * . Part 2: On a known Existence Rule for the Probability Calculus. Rend. Sem. Mat. Univ. Padova, 65, 1981, 263-270. 742105 0533.03006 MONTANARO, A. - BRESSAN, A., Contributions to Foundations of Probability calculus on the basis of the Modal Logical Calculus $MC^{v}$ M C v or $MC^{v*}$ M C v A * . Part 3: An analysis of the notions of random variables and Probability Spaces, based on Modal Logic. Rend. Sem. Mat. Univ. Padova, 70, 1983, 1-11. 702154 0538.70001 BRESSAN, A. - MONTANARO, A., Axiomatic Foundations of the Kinematics Common to Classical Physics and Special Relativity. Rend. Sem. Mat. Univ. Padova, 68, 1982, 163-182. (={D} Br&Mont). 1000022 0774.73004 MONTANARO, A., A completion of A. Bressan's work on axiomatic foundations of the Mach Painlevé type for various classical theories of continuous media. Part 1. Completion of Bressan's work based on the notions of gravitational equivalence of affine inertial frames. Atti Acc. Lincei Rend. fis., s. 8, v. 81, 1987, 35-46. 1000023 0774.73005 MONTANARO, A., A completion of A. Bressan's work on axiomatic foundations of the Mach Painlevé type for various classical theories of continuous media. Part 2. Alternative completion of Bressan's work, fit for extension to special relativity. Atti Acc. Lincei Rend. fis., s. 8, v. 81, 1987, 47-54. 1082620 0725.73004 BRESSAN, A. - MONTANARO, A., On the uniqueness of response stress-functionals for purely mechanical continuous media, from the Mach-Painlevé point of view. Mem. Mat. Acc. Lincei, s. 9, v. 1, 1990, 59-94. 1192001 0773.73020 MONTANARO, A., On the response stress-function of an elastic body, from the Mach-Painlevé point of view. Atti Ist. Veneto Scienze Lettere Arti, 147, 1989, 1-11. 1207018 0768.73008 10.1007/BF00041772 MONTANARO, A., On heat flux in simple media. Journal of Elasticity, 30, n. 1, 1993, 81-101. 1088046 0725.73005 MONTANARO, A., On the response functions of a thermo-elastic body, from the Mach-Painlevé point of view. Mem. Mat. Acc. Lincei, s. 9, v. 1, 1990, 123-146. 1094311 0717.73009 10.1007/BF01556441 MONTANARO, A., On the Clausius-Planck inequality within theories for differential materials. Meccanica, 25, 1990, 192-194. 1192005 0773.73003 MONTANARO, A., On the indeterminateness of the constitutive equations for certain dissipative materials. Atti Ist. Veneto Scienze Lettere Arti, 148, 1989-1990, 109-126. 1289639 0805.73008 MONTANARO, A., Definitions of standard stress and standard heat flux, in simple bodies, treated according to Mach and Painlevé. Rend. Sem. Mat. Univ. Padova, 91, 1994, 229-249. 1135430 0759.53006 MONTANARO, A., On tensor functions whose gradients have some skew-symmetries. Rend. Mat. Acc. Lincei, s. 9, v. 2, 1991, 259-268. 1243957 0796.35020 10.1007/BF01759323 MONTANARO, A. - PIGOZZI, D., On a large class of symmetric systems of linear PDEs for tensor functions useful in mathematical physics. Annali di Matematica Pura e Applicata, 164, 1993, 259-273. 0793.73011 MONTANARO, A., Uniqueness theorems for the entropy of any differential material of complexity one. Meccanica, 27, 1994, 75-83. 1183124 0780.73007 10.1016/0020-7462(92)90039-A MONTANARO, A., Entropy-free theories for differential materials. Int. J. Non-Linear Mechanics, 27, n. 5, 1992, 845-860. 1281480 0809.15016 10.1016/0020-7462(94)90004-3 MONTANARO, A. - PIGOZZI, D., On weakly isotropic tensors. Int. J. Non-Linear Mechanics, 29, n. 3, 1994, 295-309. 1292090 0805.73009 MONTANARO, A. - PIGOZZI, D., On the response function for the heat flux in bodies of the differential type. Mem. Mat. Acc. Lincei, s. 9, v. 2, 1994, 85-107. 1283995 0815.73005 MONTANARO, A. - PIGOZZI, D., On the physical indetermination of the response functions for general bodies of the differential type. Rendiconti di Matematica e delle sue applicazioni, s. 7, v. 13, 1993, 701-731. 1233178 0791.73005 MONTANARO, A., Constitutive equations for quasi-processes of local pure-jump in simple materials with fading memory. Part 1 - Constitutive functions of local pure-jump. Part 2 - A more general theory in which only the dynamic part of entropy exists. Mem. Mat. Acc. Lincei, s. 9, v. 1, f. 7, 1993, 197-236. 1281481 0819.73005 10.1016/0020-7462(94)90005-1 MONTANARO, A., A dissipation inequality involving only the dynamic part of entropy. Int. J. Non-Linear Mechanics, 29, n. 3, 1994, 311-334. MONTANARO, A., On thermoelasticity in the absence of heat sources and a natural restriction for heat flux in simple media. Stability & Applied Analysis of Continuous Media, SAACM, vol. 2, n. 4, 1992. 1657111 0916.73008 10.1007/s002050050110 MONTANARO, A., Global equivalence for deformable thermoelastic bodies. Archive for Rational Mechanics and Analysis, 143, 4, 1998, 375-402. 1469859 0896.73013 10.1016/S0020-7462(97)00011-5 MONTANARO, A., An analysis of the Propagation Condition for Small Displacement Waves in Prestressed Bodies. Int. J. of Non-Linear Mechanics, 33, 1998, 327-355. 1603979 0899.73102 10.1023/A:1004238416907 MONTANARO, A., On Small-displacement Waves in a Prestressed Body with Isotropic Incremental Elasticity Tensor. Meccanica, 32, 1997, 505-514. 1469382 0904.46031 10.1006/jmaa.1997.5498 MONTANARO, A. - PIGOZZI, D., A note about differentiability of maps defined on convex subsets of Banach spaces that may be nowhere dense. Journal of Mathematical Analysis and Applications, 213, 1997, 370-386. 1468636 0884.73012 10.1023/A:1007375130803 MONTANARO, A., Wave propagation along axes of symmetry in linearly elastic media with initial stress. Journal of Elasticity, 46, 1997, 217-221. 1837582 1020.74003 MONTANARO, A. - PIGOZZI, D., General and physically privileged solutions to certain symmetric systems of linear P.D.E.s with tensor functionals as unknowns. Rend. Mat. Acc. Lincei, s. 9, v. 11, 2000, 245-278. MONTANARO, A., On singular surfaces in isotropic linear thermoelasticity with initial stress. J. Acoust. Soc. Am., 106, 3, Pt. 1, September 1999, 1586-1588. 1785153 0977.74036 10.1023/A:1007641808977 MONTANARO, A., Equivalence theorems on the propagation of small amplitude waves in prestressed linearly elastic materials with internal constraints. Journal of Elasticity, 57, 1999, 25-53. 1842357 1045.74020 10.1177/108128650100600404 MONTANARO, A., Global equivalence for rigid heat-conducting bodies. Mathematics & Mechanics of Solids, 6, 2001, 423-436. MONTANARO, A., Details on singular surfaces in isotropic linear thermoelasticity with initial stress. Atti Ist. Veneto Scienze Lettere Arti, 157, 2, 1999, 411-422. 1916963 1205.74039 10.1023/A:1016109216213 MONTANARO, A., On discontinuity waves in linear piezoelectricity. Journal of Elasticity, 65, 2001, 49-60. 0065.39301 PAINLEVÉ, P., Les axiomes de la mécanique. Gauthier-Villars, Paris 1922. (={D} Painlevé 1922) 2064227 1060.74050 10.1023/B:ELAS.0000018779.45974.97 PITTERI, M., On certain weak phase transformations in multilattices. Journal of Elasticity, 72, 2003, 241-261. (={D} Pitteri 2003) 2064227 1060.74050 10.1023/B:ELAS.0000018779.45974.97 PITTERI, M., On certain weak phase transformations in multilattices. Preprint DMSA, 2003, Padova, n. 88, 2/ 12/2002, available at www.dmsa.unipd.it/tmr/PreprintDMMMSA.pdf. Printed also in Truesdell's volume. (={D} ExtendPitt) 769106 0599.01013 10.1007/978-1-4613-8185-3 TRUESDELL, C.A., An idiot's fugitive essays on science: methods, criticism, training, circumstances. Springer-Verlag, New York 1984. (={D} Truesdell 1984) 636625 0484.03006 ZANARDO, A., A completeness theorem for the general interpreted modal calculus $MC^{v}$ M C v of A. Bressan. Rend. Sem. Mat. Univ. Padova, 64, 1981, 39-57. (={D} Zanardo 1981) 703502 0524.03010 10.1305/ndjfl/1093870381 ZANARDO, A., On the equivalence between the calculi $MC^{v}$ M C v and $EC^{v+1}$ E C v + 1 of A. Bressan. Notre Dame J. of Formal Logic, 24, 1983, 367-388. (={D} Zanardo 1983) 759290 0555.03009 10.1305/ndjfl/1093870685 ZANARDO, A., Individual concepts as propositional variables in $LM^{v+1}$ L M v + 1 . Notre Dame J. of Formal Logic, 25, 1984, 332-346. (={D} Zanardo 1984) ZANARDO, A., On a recent unpublished conjecture by Aldo Bressan. Atti Ist. Veneto Scienze Lettere Arti, 162, 2004, 517-523. (={D} Zanardo 2004)
oai:bdim.eu:RLIN_1997_9_8_3_197_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1997_9_8_3_197_0 A Boundary Value Problem Connected with Response of Semi-space to a Short Laser Pulse Un problema di valori al contorno connesso alla risposta di un semispazio ad un breve impulso laser Fichera Gaetano 1997 10 8 RLIN_1997_9_8 9 3 RLIN_1997_9_8_3 197 228 1611621 0903.35034 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

In this paper a mixed boundary value problem for the fourth order hyperbolic equation with constant coefficients which is connected with response of semi-space to a short laser pulse» and belongs to generalized Thermoelasticity is studied. This problem was considered by R. B. Hetnarski and J. Ignaczak, who established some important physical consequences. The present paper contains proof of the existence, uniqueness and continuous dependence of a solution on the datum, together with an effective method for numerical computation of a solution and the behaviour of solutions as \( t \rightarrow \infty \) t

In questo lavoro viene studiato, nell'ambito della Termoelasticità generalizzata, un problema di valori al contorno di tipo misto per un'equazione iperbolica del quarto ordine a coefficienti costanti. Tale problema è connesso alla risposta di un semispazio ad un breve impulso laser. Di questa tematica si sono occupati R. B. Hetnarski e J. Ignaczak, ai quali si debbono alcuni importanti risultati fisici. Per il detto problema, in questo lavoro si dimostra l'esistenza, l'unicità di una soluzione, nonché la dipendenza continua dai dati. Si indica inoltre un metodo effettivo di calcolo numerico e si studia il comportamento delle soluzioni per \( t \rightarrow \infty \) t

Hyperbolic equations Mixed boundary value problems Tauber-type theorem Asymptotics of solutions for large values of the time provider bdim
1245181 10.1080/01495739308946241 HETNARSKI, R. B. - IGNACZAK, J., Generalized thermoelasticity: closed form solution. Journal of Thermal Stresses, v. 16, n. 4, 1993, 473-498. 1289595 10.1080/01495739408946267 HETNARSKI, R. B. - IGNACZAK, J., Generalized thermoelasticity: response of semispace to a short laser pulse. Journal of Thermal Stresses, v. 17, 1994, 377-396. 0231.35053 AGMON, S., Problème mixte pour les équations hyperboliques d'ordre supérieur. Colloq. Intern. Equations aux dérivées partielles. CNRS, Paris 1962, 1-6. 0203.10001 SAKAMOTO, R., Mixed problems for hyperbolic equations, I, II. J. Math. Kyoto University, 10:3, 1970, 349-373,403-417. 422891 0345.35067 SAKAMOTO, R., On a class of hyperbolic mixed problems. J. Math. Kyoto University, 16:2, 1976, 429-474. IVRII, V. YA. - VOLEVICH, L. R., Hyperbolic equations. In: I. G. Petrovsky selected works. Part. I. Gordon and Breach Publ., 1996, 410-442. 344808 0070.33102 DOETSCH, G., Handbuch der Laplace-Transformation. Band I. Théorie der Laplace Transformation. Verlag Birkhäuser, Basel 1950. 65760 0059.08402 PETROVSKY, G., Lectures on Partial Differential Equations. Interscience Publishers Inc., New York 1954.
oai:bdim.eu:RLIN_2005_9_16_3_171_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2005_9_16_3_171_0 Harnack inequality and heat kernel estimates for the Schrödinger operator with Hardy potential Disuguaglianza di Harnack e stime sul nucleo del calore per l'operatore di Schrödinger con potenziale di Hardy Moschini Luisa Tesei Alberto 2005 9 16 RLIN_2005_9_16 9 3 RLIN_2005_9_16_3 171 180 2227741 1225.35112 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

In this preliminary Note we outline some results of the forthcoming paper [11], concerning positive solutions of the equation $\partial_{t} u = \triangle u + \frac{c}{|x^{2}|} u \big( 0 < c < \frac{(n-2)^{2}}{4}; \, n \ge 3 \big)$ t u = u + c x 2 u ( 0 < c < n - 2 2 4 ; n 3 ) . A parabolic Harnack inequality is proved, which in particular implies a sharp two-sided estimate for the associated heat kernel. Our approach relies on the unitary equivalence of the Schrödinger operator $Hu = - \triangle u - \frac{c}{|x|^{2}} u$ H u = - u - c x 2 u with the opposite of the weighted Laplacian $\triangle_{\lambda} v = \frac{1}{|x|^{\lambda}} \text{div} (|x|^{\lambda} \nabla v)$ λ v = 1 x λ div x λ v when $\lambda = 2 - n + 2 \sqrt{c_{0} - c}$ λ = 2 - n + 2 c 0 - c .

In questa Nota preliminare si presentano alcuni risultati del successivo lavoro [11], riguardanti soluzioni positive dell'equazione $\partial_{t} u = \triangle u + \frac{c}{|x^{2}|} u \big( 0 < c < \frac{(n-2)^{2}}{4}; \, n \ge 3 \big)$ t u = u + c x 2 u ( 0 < c < n - 2 2 4 ; n 3 ) . Si dimostra una disuguaglianza di Harnack parabolica, che in particolare implica una stima bilatera sul nucleo del calore associato. Il nostro approccio si basa sull'equivalenza unitaria dell'operatore di Schrödinger $Hu = - \triangle u - \frac{c}{|x|^{2}} u$ H u = - u - c x 2 u con l'opposto dell'operatore di Laplace pesato $\triangle_{\lambda} v = \frac{1}{|x|^{\lambda}} \text{div} (|x|^{\lambda} \nabla v)$ λ v = 1 x λ div x λ v quando $\lambda = 2 - n + 2 \sqrt{c_{0} - c}$ λ = 2 - n + 2 c 0 - c .

Harnack inequality Moser iteration technique Weighted Laplace-Beltrami operator Sharp heat kernel estimate Hardy potential provider bdim
2034290 1058.35049 10.1016/j.jfa.2003.10.002 BARBATIS, G. - FILIPPAS, S. - TERTIKAS, A., Critical heat kernel estimates for Schrödinger operators via Hardy-Sobolev inequalities. J. Funct. Anal., 208, 2004, 1-30. 2179651 1161.35383 10.1007/s00029-005-0003-z BREZIS, H. - DUPAIGNE, L. - TESEI, A., On a semilinear elliptic equation with inverse-square potential. Selecta Math., 11, 2005, 1-7. 799906 0588.35013 CHIARENZA, F.M. - SERAPIONI, R.P., A remark on a Harnack inequality for degenerate parabolic equations. Rend. Sem. Mat. Univ. Padova, 73, 1985, 179-190. 990239 0699.35006 10.1017/CBO9780511566158 DAVIES, E.B., Heat Kernels and Spectral Theory. Cambridge Tracts in Mathematics, 92, Cambridge University Press, 1989. 855753 0652.35052 10.1007/BF00251802 FABES, E.D. - STROOCK, D.W., A new proof of Moser's parabolic Harnack inequality via the old ideas of Nash. Arch. Rat. Mech. Anal., 96, 1986, 327-338. 1098839 GRIGORYAN, A., The heat equation on non-compact Riemannian manifolds. Mat. Sb., 182, 1991, 55-87 (in Russian); Engl. transl.: Math. USSR Sb., 72, 1992, 47-77. 2218016 1106.58016 10.1090/conm/398/07486 GRIGORYAN, A., Heat kernels on weighted manifolds and applications. Cont. Math., to appear; http:// www.ma.ic.ac.uk/~grigor/wma.pdf 2149405 1115.58024 GRIGORYAN, A. - SALOFF-COSTE, L., Stability results for Harnack inequalities. Ann. Inst. Fourier (Grenoble), 55, 2005, to appear; http://www.ma.ic.ac.uk/~grigor/vc1eps.pdf 1994762 1036.35044 10.1016/S0022-1236(03)00018-1 MILMAN, P.D. - SEMENOV, Y.A., Heat kernel bounds and desingularizing weights. J. Funct. Anal., 202, 2003, 1-24. 2064932 1057.47043 10.1016/j.jfa.2003.12.008 MILMAN, P.D. - SEMENOV, Y.A., Global heat kernel bounds via desingularizing weights. J. Funct. Anal., 212, 2004, 373-398. 2328115 1145.35051 10.1515/FORUM.2007.017 MOSCHINI, L. - TESEI, A., Parabolic Harnack Inequality for the Heat Equation with Inverse-Square Potential. Forum Math., to appear. 1150597 0769.58054 10.1155/S1073792892000047 SALOFF-COSTE, L., A note on Poincaré, Sobolev and Harnack inequalities. Int. Math. Res. Notes, 2, 1992, 27-38. 1354894 0840.31006 10.1007/BF01053457 SALOFF-COSTE, L., Parabolic Harnack inequality for divergence form second order differential operators. Potential Anal., 4, 1995, 429-467. 1872526 0991.35002 SALOFF-COSTE, L., Aspects of Sobolev-Type Inequalities. London Math. Soc. Lecture Notes, 289, Cambridge University Press, 2002.
oai:bdim.eu:RLIN_2004_9_15_2_137_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2004_9_15_2_137_0 A plane problem of incompressible magnetohydro-dynamics with viscosity and resistivity depending on the temperature Un problema piano di magnetoidrodinamica incomprimibile con viscosità e resistività dipendenti dalla temperatura Cimatti Giovanni 2004 6 15 RLIN_2004_9_15 9 2 RLIN_2004_9_15_2 137 146 2148541 1225.76302 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

The plane flow of a fluid obeying the equations of magnetohydrodynamics is studied under the assumption that both the viscosity and the resistivity depend on the temperature. Some results of existence, non-existence, and uniqueness of solution are proved.

Si studia il moto piano di un fluido retto dalle equazioni della magnetoidrodinamica supponendo che tanto la viscosità quanto la resistività dipendano dalla temperatura. Si dimostrano alcuni risultati di esistenza, nonesistenza e unicità di soluzioni.

Incompressible magnetohydrodynamics Thermistor problem Existence of solutions provider bdim
1317875 0826.35120 10.1017/S0956792500001686 ALLEGRETTO, W. - XIE, H., A non-local thermistor problem. European J. of Appl. Math., v. 6, 1995, 83-94. 987900 0694.35137 CIMATTI, G., Remark on existence and uniqueness for the thermistor problem under mixed boundary conditions. Quart. Appl. Math., v. 97, 1989, 117-121. 980982 0675.35039 10.1007/BF01766151 CIMATTI, G. - PRODI, G., Existence results for a nonlinear elliptic system modelling a temperature dependent resistor. Ann. Math. Pura Appl., v. 62, 1988, 227-236. 98556 0435.76086 COWLING, T.G., Magnetohydrodynamics. Interscience Tracts on Physics, New York 1957. 1012273 0692.35094 HOWISON, S.D., A note on the thermistor problem in two space dimensions. Quart. Appl. Math., v. 98, 1989, 37-39. 0189.40603 LIONS, J.L., Quelques méthodes de résolution des problèmes aux limites non linéaires. Etudes mathématiques, Dunod, Paris 1969.
oai:bdim.eu:RLIN_2002_9_13_3-4_295_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2002_9_13_3-4_295_0 Unique determination of local $CR$ C R -maps by their jets: a survey Zaitsev Dmitri 2002 12 13 RLIN_2002_9_13 9 3-4 RLIN_2002_9_13_3-4 295 305 1984108 1098.32018 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

We survey results on unique determination of local $CR$ C R -automorphisms of smooth $CR$ C R -manifolds and of local biholomorphisms of real-analytic $CR$ C R -submanifolds of complex spaces by their jets of finite order at a given point. Examples generalizing [28] are given showing that the required jet order may be arbitrarily high.

Jets of biholomorphic maps Real hypersurfaces of finite type CR-manifolds provider bdim
1440933 0890.32005 10.1007/BF02392622 Baouendi, M.S. - Ebenfelt, P. - Rothschild, L.P., Algebraicity of holomorphic mappings between real algebraic sets in $\mathbb{C}^{n}$ C n . Acta Math., 177, 1996, 225-273. 1480988 0943.32021 Baouendi, M.S. - Ebenfelt, P. - Rothschild, L.P., Parametrization of local biholomorphisms of real analytic hypersurfaces. Asian J. Math., 1, 1997, 1-16. 1651418 0982.32030 Baouendi, M.S. - Ebenfelt, P. - Rothschild, L.P., $CR$ C R automorphisms of real analytic manifolds in complex space. Comm. Anal. Geom., 6, 1998, n. 2, 291-315. 1668103 0944.32040 Baouendi, M.S. - Ebenfelt, P. - Rothschild, L.P., Real Submanifolds in Complex Space and Their Mappings. Princeton Math. Series, 47, Princeton Univ. Press, 1999. 1721797 0942.32027 10.1007/s002080050365 Baouendi, M.S. - Ebenfelt, P. - Rothschild, L.P., Rational dependence of smooth and analytic $CR$ C R mappings on their jets. Math. Ann., 315, 1999, 205-249. 1775734 0958.32033 10.1090/S0894-0347-00-00343-X Baouendi, M.S. - Ebenfelt, P. - Rothschild, L.P., Convergence and finite determination of formal $CR$ C R mappings. J. Amer. Math. Soc., 13, 2000, 697-723. 1916859 1039.32021 10.1007/BF02930653 Baouendi, M.S. - Mir, N. - Rothschild, L.P., Reflection ideals and mappings between generic submanifolds in complex space. J. Geom. Anal., to appear; http://arXiv.org/abs/math.CV/0012243 1908985 1037.32030 Baouendi, M.S. - Rothschild, L.P. - Zaitsev, D., Equivalences of real submanifolds in complex space. J. Differential Geom., to appear; http://arXiv.org/abs/math.CV/0002186 1912728 1023.32023 Baouendi, M.S. - Rothschild, L.P. - Zaitsev, D., Points in general position in real-analytic submanifolds in $\mathbb{C}^{N}$ C N and applications. Ohio State Univ. Math. Res. Inst. Publ., 8, de Gruyter, Berlin 2001, to appear. Baracco, L. - Zaitsev, D. - Zampieri, G., A Burns-Krantz type rigidity theorem for wedges. Preprint 2001. 534592 0456.32015 Beloshapka, V.K., On the dimension of the group of automorphisms of an analytic hypersurface. Izv. Akad. Nauk SSSR Ser. Mat., 43, 1979, n. 2, 243-266 (in Russian); translation in Math. USSR, Izv., 14, 1980, 223-245. 1052063 0715.32011 10.1007/BF01138501 Beloshapka, V.K., A uniqueness theorem for automorphisms of a nondegenerate surface in a complex space. Mat. Zametki, 47, 1990, n. 3, 17-22 (in Russian); translation in Math. Notes, 47, 1990, n. 3, 239-242. 589930 0346.32013 Bloom, T. - Graham, I., On type conditions for generic real submanifolds of $\mathbb{C}^{n}$ C n . Invent. Math., 40, 1977, 217-243. 1242454 0807.32008 10.2307/2152787 Burns, D.M. - Krantz, S.G., Rigidity of holomorphic mappings and a new Schwarz lemma at the boundary. J. Amer. Math. Soc., 7, 1994, n. 3, 661-676. 1553196 0005.37401 58.1256.03 10.1007/BF02417822 Cartan, E., Sur la géométrie pseudo-conforme des hypersurfaces de deux variables complexes. I. Ann. Mat. Pura Appl., 11, 1932, 17-90. Œuvres complètes, Part. II, vol. 2, Gauthier-Villars, 1952, 1231-1304; II. Ann. Sc. Norm. Sup. Pisa, 1, 1932, 333-354. Œuvres complètes, Part. III, vol. 2, Gauthier-Villars, 1952, 1217-1238. 0010.39502 61.0370.02 Cartan, H., Sur les groupes de transformations analytiques. Act. Sc. et Int., Hermann, Paris 1935. 425155 0302.32015 Chern, S.S. - Moser, J.K., Real hypersurfaces in complex manifolds. Acta Math., 133, 1974, 219-271. 1913814 1015.32031 Ebenfelt, P., Finite jet determination of holomorphic mappings at the boundary. Asian J. Math., 5, 2001, n. 4, 637-662. 1895709 1002.32028 10.1007/s002080200007 Ebenfelt, P., On the analyticity of $CR$ C R mappings between nonminimal hypersurfaces. Math. Ann., 322, 2002, n. 3, 583-602. 1995799 1032.32025 10.1007/s00039-003-0422-y Ebenfelt, P. - Lamel, B. - Zaitsev, D., Finite jet determination of local analytic $CR$ C R automorphisms and their parametrization by 2-jets in the finite type case. Preprint 2001; http://arXiv.org/abs/math.CV/0107013 1723606 0935.32014 Gentili, G. - Migliorini, S., A boundary rigidity problem for holomorphic mappings. Proceedings of the Third International Workshop on Differential Geometry and its Applications and the First German-Romanian Seminar on Geometry (Sibiu, 1997). Gen. Math., 5, 1997, 161-174. 1474199 0892.32015 10.1007/s002080050119 Han, C.-K., Complete differential system for the mappings of $CR$ C R manifolds of nondegenerate Levi forms. Math. Ann., 309, 1997, 401-409. 1335086 0845.32026 10.4153/CJM-1995-022-3 Huang, X., A boundary rigidity problem for holomorphic mappings on some weakly pseudoconvex domains. Canad. J. Math., 47, 1995, n. 2, 405-420. 466651 0371.32021 Kaup, W. - Upmeier, H., An infinitesimal version of Cartan’s uniqueness theorem. Manuscripta Math., 22, 1977, n. 4, 381-401. 1808664 0981.32023 Kim, S.-Y., Complete system of finite order for $CR$ C R mappings between real analytic hypersurfaces of degenerate Levi form. J. Korean Math. Soc., 38, 2001, n. 1, 87-99. 2122216 10.1016/j.top.2004.11.004 Kim, S.-Y. - Zaitsev, D., The equivalence and the embedding problems for $CR$ C R -structures of any codimension. Preprint 2001; http://arXiv.org/abs/math.CV/0108093 322365 0256.35060 Kohn, J.J., Boundary behavior of $\bar{\partial}$ ¯ on weakly pseudo-convex manifolds of dimension two. J. Differential Geom., 6, 1972, 523-542. 1920048 10.1090/S0002-9939-02-06545-0 Kowalski, R.T., A hypersurface in C2 whose stability group is not determined by 2-jets. Preprint 2001; http://arXiv.org/abs/math.CV/0107170 1106.32025 Kowalski, R.T., Rational jet dependence of formal equivalences between real-analytic hypersurfaces in $\mathbb{C}^{2}$ C 2 . Preprint 2001; http://arXiv.org/abs/math.CV/0108165 1875899 1061.32027 10.2140/pjm.2001.201.357 Lamel, B., Holomorphic maps of real submanifolds in complex spaces of different dimensions. Pacific J. Math., 201, 2001, n. 2, 357-387. 623353 0473.32016 Loboda, A.V., On local automorphisms of real-analytic hypersurfaces (in Russian). Izv. Akad. Nauk SSSR, Ser. Mat., 45, 1981, 620-645; translation in Math. USSR, Izv., 18, 1982, 537-559. 199865 0147.23502 Nagano, T., Linear differential systems with singularities and an application to transitive lie algebras. J. Math. Soc. Japan, 18, 1966, 398-404. 1314461 0826.32013 10.2307/2375039 Stanton, N.K., Infinitesimal $CR$ C R automorphisms of rigid hypersurfaces. Amer. J. Math., 117, 1995, n. 1, 141-167. 1375306 0849.32012 Stanton, N.K., Infinitesimal $CR$ C R automorphisms of real hypersurfaces. Amer. J. Math., 118, 1996, n. 1, 209-233. 145555 0113.06303 Tanaka, N., On the pseudo-conformal geometry of hupersurfaces of the space of $n$ n complex variables. J. Math. Soc. Japan, 14, 1962, 397-429. 206992 0154.33501 Tomassini, G., Tracce delle funzioni olomorfe sulle sotto varietà analitiche reali d’una varietà complessa. Ann. Scuola Norm. Sup. Pisa, 20, 1966, 31-43. 945904 0692.58005 Tumanov, A.E., Extension of $CR$ C R -functions into a wedge from a manifold of finite type (in Russian). Mat. Sb. (N.S.), 136 (178), 1988, n. 1, 128-139; translation in Math. USSR-Sb., 64, 1989, n. 1, 129-140. 1492123 0898.32006 Zaitsev, D., Germs of local automorphisms of real analytic $CR$ C R structures and analytic dependence on the $k$ k -jets. Math. Res. Lett., 4, 1997, 1-20.
oai:bdim.eu:RLIN_2005_9_16_1_11_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2005_9_16_1_11_0 On integral representations of $q$ q -gamma and $q$ q -beta functions Sulle rappresentazioni integrali delle funzioni $q$ q -gamma e $q$ q -beta De Sole Alberto Kac Victor G. 2005 3 16 RLIN_2005_9_16 9 1 RLIN_2005_9_16_1 11 29 2225920 1225.33017 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

We study $q$ q -integral representations of the $q$ q -gamma and the $q$ q -beta functions. As an application of these integral representations, we obtain a simple conceptual proof of a family of identities for Jacobi triple product, including Jacobi's identity, and of Ramanujan's formula for the bilateral hypergeometric series.

Studiamo la rappresentazione $q$ q -integrale delle funzioni $q$ q -gamma e $q$ q -beta. Questo studio svela una $q$ q -costante molto interessante. Come applicazione di queste rappresentazioni integrali, otteniamo una semlice dimostrazione concettuale di una famiglia di identità per il prodotto triplo di Jacobi, che include l'identità di Jacobi, e della formula di Ramanujan per le serie ipergeometriche bilaterali.

$q$ q -calculus $q$ q -gamma function $q$ q -beta function provider bdim
1688958 0920.33001 ANDREWS, G.E. - ASKEY, R. - ROY, R., Special functions. Encyclopedia of Mathematics and its Applications, vol. 1, Cambridge University Press, Cambridge 1999, 664 pp. 708496 0514.33001 EXTON, H., $q$ q -hypergeometric functions and applications. Ellis Horwood Series in Mathematics and its Applications, Ellis Horwood Ltd., Chichester 1983, 347 pp. 1052153 1129.33005 GASPER, G. - RAHMAN, M., Basic hypergeometric series. Encyclopedia of Mathematics and its Applications, vol. 35, second edition, Cambridge University Press, Cambridge 1990, 456 pp. 35.0460.01 JACKSON, F.H., A generalization of the functions $\Gamma(n)$ Γ n and $x^{n}$ x n . Proc. Roy. Soc. London, 74, 1904, 64-72. 41.0317.04 JACKSON, F.H., On $q$ q -definite integrals. Quart. J. Pure and Applied Math., 41, 1910, 193-203. 1865777 0986.05001 10.1007/978-1-4613-0071-7 KAC, V.G. - CHEUNG, P., Quantum Calculus. Universitext, Springer-Verlag, New York 2002, 112 pp. 1104219 0716.17022 10.1017/CBO9780511626234 KAC, V.G., Infinite dimensional Lie algebras. Third edition, Cambridge University Press, Cambridge 1990, 400 pp. 1651389 0861.17017 KAC, V.G., Vertex algebras for beginners. University Lecture Series, 10, second edition, American Mathematical Society, Providence, RI, 1998, 201 pp. 1327543 0854.17028 KAC, V.G. - WAKIMOTO, M., Integrable highest weight modules over affine superalgebras and number theory. In: J.-L. BRYLINSKI et al. (eds.), Lie theory and geometry. Progr. Math., 123, Birkhäuser, Boston 1994, 415-456. 1303081 0826.17018 10.1063/1.530644 KEMPF, A. - MAJID, S., Algebraic $q$ q -integration and Fourier theory on quantum and braided spaces. Journal of Mathematical Physics, 35, 1994, 6802-6837. 1490602 0768.33018 KOORNWINDER, T.H., $q$ q -special functions, a tutorial. Preprint math. CA/9403216, 1994. 1431306 0821.17015 KOORNWINDER, T.H., Compact quantum groups and $q$ q -special functions. In: V. BALDONI - M.A. PICARDELLO (eds.), Representations of Lie groups and quantum groups. Pitman Research Notes in Mathematics Series, 311, Longman Scientific & Technical, 1994, 46-128. 1448685 0882.33014 KOORNWINDER, T.H., Special functions and $q$ q -commuting variables. In: M.E.H. ISMAIL - D.R. MASSON - M. RAHMAN (eds.), Special functions, $q$ q -series and related topics (Toronto, ON, 1995). Fields Inst. Commun., vol. 14, Amer. Math. Soc., Providence 1997, 131-166. 02.0122.04 THOMAE, J., Beitrage zur Theorie der durch die Heinesche Reihe. J. reine angew. Math., 70, 1869, 258-281.
oai:bdim.eu:RLIN_1990_9_1_1_21_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1990_9_1_1_21_0 Convergence results for periodic solutions of nonautonomous Hamiltonian systems Risultati di convergenza per soluzioni periodiche di sistemi Hamiltoniani non autonomi Girardi Mario Matzeu Michele 1990 2 1 RLIN_1990_9_1 9 1 RLIN_1990_9_1_1 21 28 1081822 0698.70014 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

We prove some stability results for a certain class of periodic solutions of nonautonomous Hamiltonian systems in the case of Hamiltonian functions either with subquadratic growth or homogeneous with superquadratic growth. Thus we extend to the nonautonomous case some results recently established by the Authors for the autonomous case.

Si dimostrano alcuni risultati di stabilità per una certa classe di soluzioni di sistemi Hamiltoniani non autonomi nel caso di funzioni Hamiltoniane a crescita sottoquadratica, o a crescita superquadratica con ipotesi di omogeneità. Si estendono in tal modo al caso non autonomo alcuni risultati stabiliti di recente dagli Autori per il caso autonomo.

Convergence Periodic solutions Hamiltonian systems provider bdim
615860 0466.70022 10.1007/BF01450713 AMBROSETTI, A. - MANCINI, G., Solutions of minimal period for a class of convex Uamiltonian systems. Math. Ann. 255, 1981, 404-421. 562546 0403.70016 10.1002/cpa.3160330202 CLARKE, F. - EKELAND, I., Hamiltonian trajectories having prescribed minimal period. Comm. Pure Appl. Math. 33, 1980, 103-116. 448194 0339.49005 DE GIORGI, E. - FRANZONI, T., Su un tipo di convergenza variazionale. Atti Acc. Lincei Rend. fis., s. 8, vol. 58, fasc. 6, 1975, 842-850. 966922 0669.70022 GIRARDI, M. - MATZEU, M., Some stability results on periodic Hamiltonian trajectories. Boll. UMI, (7), 2-A, 1988, 383-390. 1026156 0712.58047 GIRARDI, M. - MATZEU, M., Some convergence results for periodic Hamiltonian trajectories. Proceedings of the International Conference on Theory and Applications of Differential Equations (21-25/3/1988), vol. I, Ohio Univ. 1989, 320-324. 467437 0393.49007 MARCELLINI, P. - SBORDONE, C., Dualità e perturbazione di funzionali integrali. Ricerche di Matematica, vol. 26, fasc. 2, 1977, 383-421.
oai:bdim.eu:RLIN_1993_9_4_4_251_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1993_9_4_4_251_0 Compact embedding theorems for generalized Sobolev spaces Alcuni teoremi di immersione compatta per spazi di Sobolev generalizzati Manfredini Maria 1993 12 4 RLIN_1993_9_4 9 4 RLIN_1993_9_4_4 251 263 1269615 0809.46028 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

In this Note we give some compact embedding theorems for Sobolev spaces, related to \( m \) m -tuples of vectors fields of \( C^{1} \) C 1 class on \( \mathbb{R}^{N} \) R N .

In questa Nota dimostriamo alcuni teoremi di immersione compatta per spazi di Sobolev, relativi a \( m \) m -uple di campi vettoriali di classe \( C^{1} \) C 1 su \( \mathbb{R}^{N} \) R N .

Sobolev spaces Compact embedding provider bdim
423064 0355.46016 AVANTAGGIATI, A., Spazi di Sobolev con peso e alcune applicazioni. Boll. U.M.I., (5), 13-A, 1976, 1-52. 312241 0253.35038 BERGER, M.S. - SCHECHTER, M., Embedding theorems and quasi-linear elliptic boundary value problems for unbounded domains. Trans. Amer. Math. Soc., 172, 1972, 261-278. 499948 0224.43006 COIFMAN, R.R. - WEISS, G., Analyse harmonique non-commutative sur certain espaces homogènes. Lecture Notes in Mathematics, 242, Springer-Verlag, Berlin-New York 1971. 0483.35085 FEFFERMAN, C. - PHONG, D.H., Pseudo-differential operators with positive symbols. Seminair Goulaouic-Meyer-Schwartz, 23, 1981. 494315 0312.35026 FOLLAND, G.B., Subelliptic estimates and function spaces on nilpotent Lie groups. Arkiv. for Math., 13, 1975, 161-207. 657581 0508.42025 FOLLAND, G.B. - STEIN, C.R., Hardy spaces of homogeneous groups. Math. Notes Princeton Univ. Press, 1982. 745979 0553.35033 FRANCHI, B. - LANCONELLI, E., Une métrique associée à une classe d'opérateurs elliptiques dégénérés. Rend. Sem. Mat. Univ. Pol. Torino, 1983, Special Issue, 105-114. 764663 0589.46023 10.1080/03605308408820362 FRANCHI, B. - LANCONELLI, E., An embedding theorem for Sobolev spaces related to non-smooth vector fields and Harnach inequality. Comm. in Partial Differential Equations, 9, 1984, 1237-1264. 963489 0685.35046 FRANCHI, B. - SERAPIONI, R., Pointwise estimates for a class of strongly degenerate elliptic operators: a geometrical approach. Ann. Scuola Norm., vol. XIV, 1987, 527-568. 1153249 0744.22001 10.1007/978-1-4612-0979-9 FULTON, W. - HARRIS, B., Representation theory: A first course. Graduate Text in Math., 129, Springer-Verlag, 1992. 1160903 0793.35037 10.1512/iumj.1992.41.41005 GAROFALO, N. - LANCONELLI, E., Existence and nonexistence results for semilinear equations on the Heisenberg group. Ind. Univ. Math. Journ., 41, No. 1, 1992, 71-98. 233313 0371.49001 HERMANN, R., Differential geometry and the calculus of variations. Academic Press, New York-London 1968.
oai:bdim.eu:RLIN_2005_9_16_4_239_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2005_9_16_4_239_0 $K$ K -groups and wreath products Costantini Mauro Zacher Giovanni 2005 12 16 RLIN_2005_9_16 9 4 RLIN_2005_9_16_4 239 250 2255007 1119.20030 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

We give criteria for a wreath product to have complemented subgroup-lattice.

Complemented group Wreath product Subgroup lattice provider bdim
444795 0334.20022 BURGOYNE, N. - GRIESS, R. - LYONS, R., Maximal subgroups and automorphisms of Chevalley groups. Pac. J. Math., 71, 1977, 365-403. 2036918 1062.20025 10.2140/pjm.2004.213.245 COSTANTINI, M. - ZACHER, G., The finite simple groups have complemented subgroup lattices. Pac. J. Math., 213, 2004, 245-251. 1409812 0951.20001 10.1007/978-1-4612-0731-3 DIXON, J.D. - MORTIMER, B., Permutation Groups. Springer-Verlag, Berlin-Heidelberg-New York 1996. 57873 0050.02202 GASCHUTZ, W., Über die $\Phi$ Φ -Untergruppe endlicher Gruppen. Math. Z., 58, 1953, 160-170. 757086 0594.20018 10.1016/0021-8693(84)90203-5 GROSS, F. - KOVACS, L.C., On normal subgroups which are direct products. J. Algebra, 90, 1984, 133-168. 224703 0412.20002 HUPPERT, B., Endliche Gruppen, I. Springer-Verlag, Berlin-Heidelberg-New York 1967. 650245 0477.20001 HUPPERT, B. - BLACKBURN, N., Finite Groups, II. Springer-Verlag, Berlin-Heidelberg-New York 1982. 1057341 0697.20004 10.1017/CBO9780511629235 KLEIDMAN, P.B. - LIEBECK, M.W., The subgroup structure of the finite classical groups. London Math. Soc. Lecture Notes, 129, Cambridge University Press, Cambridge 1990. 1292462 0843.20003 10.1515/9783110868647 SCHMIDT, R., Subgroup lattices of groups, de Gruyter, Berlin 1994. 0888.20016 THÉVENAZ, J., Maximal subgroups of direct products. J. Algebra, 198, 1997, 352-361. 57878 0051.25802 ZACHER, G., Caratterizzazione dei gruppi risolubili d'ordine finito complementati. Rend. Sem. Mat. Univ. Padova, 22, 1953, 113-122. 53103 0048.01501 ZACHER, G., Costruzione dei gruppi finiti a sottogruppo di Frattini identico. Rend. Sem. Mat. Univ. Padova, 21, 1952, 383-394.
oai:bdim.eu:RLIN_1991_9_2_2_155_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1991_9_2_2_155_0 On the cohomological strata of families of vector bundles on algebraic surfaces Stratificazioni coomologiche di famiglie di fibrati vettoriali sulle superfici algebriche Ballico Edoardo 1991 6 2 RLIN_1991_9_2 9 2 RLIN_1991_9_2_2 155 165 1120135 0745.14004 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

In this Note we study certain natural subsets of the cohomological stratification of the moduli spaces of rank \( 2 \) 2 vector bundles on an algebraic surface. In the last section we consider the following problem: take a bundle \( E \) E given by an extension, how can one recognize that \( E \) E is a certain given bundle? The most interesting case considered here is the case \( E = T P^{3} (t) \) E = T P 3 t since it applies to the study of codimension \( 1 \) 1 meromorphic foliations with singularities on \( P^{3} \) P 3 .

In questa Nota si studiano sottoinsiemi opportuni della stratificazione per gruppi di coomologia degli schemi di moduli di fibrati vettoriali di rango \( 2 \) 2 sulle superfici algebriche. Inoltre si considera il seguente problema: dato un fibrato \( E \) E come estensione, come riconoscere che \( E \) E è isomorfo ad un altro fibrato assegnato? Si considera il caso \( E = T P^{3} (t) \) E = T P 3 t che viene applicato allo studio delle fogliazioni meromorfe con singolarità su \( P^{3} \) P 3 .

Vector bundles Algebraic surface Moduli scheme Meromorphic foliations Meromorphic foliations with singularities provider bdim
1008205 0702.14008 10.1007/BF02844641 BALLICO, E., On the minimal free resolution of s points in \( \mathbf{P}^{3} \) P 3 . Rend. Circ. Mat. Palermo, s. 2, vol. 37, 1988, 431-443. 989190 0685.14011 10.1007/BF00147473 BALLICO, E., Rank- \( 2 \) 2 vector bundles on a surface with many sections and low \( c_{2} \) c 2 . Geom. Dedicata, vol. 29, # 9 , 109-124. 1125695 0752.14017 10.1016/0021-8693(91)90231-V BALLICO, E., Life and death of a cohomology class. J. Algebra, to appear. 1164095 10.1515/form.1992.4.231 BALLICO, E., On rank \( 2 \) 2 vector bundles on an algebraic surface. Preprint. BALLICO, E. - BRUSSEE, R., On the unbalance of vector bundles on a blown-up surface. Preprint. 1166263 0757.14021 10.1515/form.1992.4.417 BALLICO, E. - CHIANTINI, L., Some properties of stable rank \( 2 \) 2 bundles on algebraic surfaces. Preprint. 948157 0662.14011 BALLICO, E. - ELLIA, PH., On space curves with maximal genus in the range \( A \) A . Rev. Roumaine Math. pures appl., vol. 33, 1988, 165-174. 846012 0621.14003 BALLICO, E. - GERAMITA, A. V., The minimal free resolution of the ideal of \( s \) s general points in \( \mathbf{P}^{3} \) P 3 . Proceedings of the 1984 Vancouver conference in Algebraic Geometry, CMS Conference Proc, vol. 6, 1986, 1-10. 809942 0535.14009 10.1112/jlms/s2-31.2.211 BALLICO, E. - NEWSTEAD, P., Uniform bundles on quadratic surfaces and some related varieties. J. London Math. Soc, s. 2, vol. 31, 1985, 211-223. 1040551 0705.14015 10.1007/BFb0083333 CATANESE, F., Footnotes to a theorem of I. Reider. Proceedings on Algebraic Geometry (L'Aquila. 1988), Lect. Notes in Math., 1417, Springer Verlag, 1989. 597836 0431.14003 10.1007/BF01457885 EIN, L., Stable vector bundles on projective spaces in char \( p>0 \) p > 0 . Math. Ann., vol. 254, 1980. 53-72. 393020 0325.14002 ELLINGSRUD, G., Sur le schéma de Hilbert des variétés de codimension \( 2 \) 2 dans \( \mathbf{P}^{e} \) P e a cone de Cohen-Macaulay. Ann. Scient. Ec. Norm. Sup., s. 4, vol. 8, 1975, 423-432. 760027 0547.14001 10.1016/0021-8693(84)90188-1 GERAMITA, A. V. - MAROSCIA, P., The ideal of forms vanishing at a finite set of points in \( \mathbf{P}^{n} \) P n . J. Algebra, vol. 90, 1984, 528-555. 923596 0641.32014 GOMEZ-MONT, X., Universal families of foliations by curves. Proceedings of the Conference on Dynamical Systems, Astérisque, vol. 150-151, 1987, 109-129. 893860 0614.32013 GOMEZ-MONT, X., Foliations by curves of complex analytic spaces. In: Contemporary Mathematics. vol. 58, part III, 1987, 123-141. 924673 0639.32013 10.2307/1971416 GOMEZ-MONT, X., The transverse dynamics of a holomorphic flow. Ann. Math., vol. 127, 1988, 49-92. 983870 0669.57012 10.2307/2001213 GOMEZ-MONT, X., Holomorphic foliations in ruled surfaces. Trans. Amer. Math. Soc, vol. 312, 1989, 179-201. 998859 0709.14008 10.1007/BF02564687 GOMEZ-MONT, X. - KEMPF, G., Stability of meromorphic vector fields in projective spaces. Comment. Math. Helvetici, vol. 64, 1989, 462-473. 527229 0412.14011 GRUSON, L. - PESKINE, C., Genre des courbes de l'espace projectif. Proceedings on Algebraic Geometry (Tromsø, 1977), Lect. Notes in Math., 687, Springer Verlag, 1978, 31-60. 514430 0411.14002 10.1007/BF01420250 HARTSHORNE, R., Stable vector bundles of rank \( 2 \) 2 on \( \mathbf{P}^{3} \) P 3 . Math. Ann., vol. 238, 1978, 229-280. 683638 0509.14015 HARTSHORNE, R. - HIRSCHOWITZ, A., Cohomology of a general instanton bundle. Ann. Scient. Ec. Norm. Sup., s. 4, vol. 15, 1982, 365-390. 993223 0686.14013 10.1515/crll.1989.397.208 HIRSCHOWITZ, A., Une conjecture pour la cohomologie des diviseurs sur les surfaces rationnelles génériques. J. reine angew. Math., vol. 397, 1989, 208-213. 1030412 0681.14032 10.1515/crll.1990.403.67 IDÁ, M., On the homogeneous ideal of the generic union of lines in \( \mathbf{P}^{3} \) P 3 . J. reine angew. Math., vol. 403, 1990, 67-153. 1074235 0716.14017 10.1080/00927879008824030 MIGLIORE, J. - MIRO-ROIG, R., On k-Buchsbaum curves in \( \mathbf{P}^{3} \) P 3 . Communications in Alg., vol. 18, 1990, 2403-2422. 209285 0187.42701 MUMFORD, D., Lectures on curves on an algebraic surface. Princeton Univ. Press, New York 1966. 561910 0438.32016 OKONEK, C. - SCHNEIDER, M. - SPINDLER, H., Vector bundles on complex projective spaces. Birkhauser, Boston-Basel-Stuttgart 1980. 364271 0298.14022 PESKINE, C. - SZPIRO, L., Liaison des variétés algébriques. Invent. Math., vol. 26, 1974, 271-302. 794092 0546.14023 10.1007/BF01455929 SAUER, T., Smoothing protectively Cohen-Macaulay space curves. Math. Ann., vol. 272, 1985, 83-90. 291182 0215.43202 VAN DE VEN, A., On uniform vector bundles. Math. Ann., vol. 195, 1972, 245-248.
oai:bdim.eu:RLIN_1993_9_4_3_207_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1993_9_4_3_207_0 A comparison theorem for the Levi equation Un teorema di confronto per l'equazione di Levi Citti Giovanna 1993 9 4 RLIN_1993_9_4 9 3 RLIN_1993_9_4_3 207 212 1250499 0822.35009 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

We prove a strong comparison principle for the solution of the Levi equation \( L(u) = \sum_{i=1}^{n} ((1 + u_{t}^{2}) (u_{x_{i}x_{i}} + u_{y_{i}y_{i}} ) + (u_{x_{i}}^{2} + u_{y_{i}}^{2}) u_{tt} + 2(u_{y_{i}} - u_{x_{i}} u_{t}) u_{x_{i}t} - 2(u_{x_{i}} + u_{y_{i}} u_{t}) u_{y_{i}t} + k (x,y,t) (1 + |Du|^{2})^{3/2} = 0 \) L ( u ) = i = 1 n ( ( 1 + u t 2 ) ( u x i x i + u y i y i ) + ( u x i 2 + u y i 2 ) u t t + 2 ( u y i - u x i u t ) u x i t - 2 ( u x i + u y i u t ) u y i t + k ( x , y , t ) ( 1 + | D u | 2 ) 3 / 2 = 0 , applying Bony Propagation Principle.

Utilizzando il principio di propagazione dei massimi di Bony proviamo un principio di confronto forte per le soluzioni dell'equazione di Levi \( L(u) = \sum_{i=1}^{n} ((1 + u_{t}^{2}) (u_{x_{i}x_{i}} + u_{y_{i}y_{i}} ) + (u_{x_{i}}^{2} + u_{y_{i}}^{2}) u_{tt} + 2(u_{y_{i}} - u_{x_{i}} u_{t}) u_{x_{i}t} - 2(u_{x_{i}} + u_{y_{i}} u_{t}) u_{y_{i}t} + k (x,y,t) (1 + |Du|^{2})^{3/2} = 0 \) L ( u ) = i = 1 n ( ( 1 + u t 2 ) ( u x i x i + u y i y i ) + ( u x i 2 + u y i 2 ) u t t + 2 ( u y i - u x i u t ) u x i t - 2 ( u x i + u y i u t ) u y i t + k ( x , y , t ) ( 1 + | D u | 2 ) 3 / 2 = 0

Maximum propagation principle Comparison principle Levi equation provider bdim
262881 0176.09703 BONY, J. M., Principe du maximum, inégalité de Harnack et unicité du problème de Cauchy pour les opérateurs elliptiques dégénérés. Ann. Inst. Fourier (Grenoble), 19, 1969, 277-304. 499287 0365.32011 BEDFORD, E. - GAVEAU, B., Hypersurfaces with bounded Levi form. Ind. Univ. Mat. J., 27, no. 5, 1978, 867-873. 517769 0411.35015 DEBIARD, A. - GAVEAU, B., Problème de Dirichlet pour l'équation de Levi. Bull. Sc. Math., II, 102, no. 4, 1978, 369-386. 980986 0681.35017 10.1007/BF01766155 TOMASSINI, G., Geometric properties of solutions of the Levi equation. Ann. di Mat. Pura e Appl., 152, 1988, 331-344. 1151589 0836.35056 10.1007/BF02844692 TOMASSINI, G., Nonlinear equations related to the Levi form. Rend. Circ. Mat. Palermo, Ser. II, T. XL, 1991, 281-297.
oai:bdim.eu:RLIN_1995_9_6_3_143_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1995_9_6_3_143_0 Spazi BV e di Nikolskii e applicazioni al problema di Stefan BV and Nikolskii spaces and applications to the Stefan problem Farina Alberto 1995 10 6 RLIN_1995_9_6 9 3 RLIN_1995_9_6_3 143 154 1363783 0838.46027 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Questa Nota è dedicata a mettere in evidenza alcune proprietà degli spazi \( BV(\Omega) = N^{1} (\Omega) \) B V Ω = N 1 Ω delle funzioni a variazione limitata e degli spazi di Nikolskii \( N_{1}^{\lambda} (\Omega) = N^{\lambda} (\Omega) \) N 1 λ Ω = N λ Ω ed \( N^{\lambda , 0} (\Omega) \) N λ , 0 Ω , ( \( \lambda \in (0, 1) \) λ 0 , 1 ), che non mi risulta siano già state esposte nella forma generale qui enunciata, quali la non separabilità, l'essere il duale di uno spazio di Banach separabile, la convergenza e la compattezza debole \( * \) * in \( L_{W^{*}}^{\infty} (0,T;N^{\lambda} (\Omega)) \) L W * 0 , T ; N λ Ω e le loro applicazioni al classico problema di Stefan bifase.

The aim of this Note is to show some properties of BV and Nikolskii spaces that to my knowledge are not present in the literature in their general form here presented; by this I mean the lack of separability, their being the dual of a separable-space, the convergence and the weak-star compactness in \( L_{W^{*}}^{\infty} (0,T;N^{\lambda} (\Omega)) \) L W * 0 , T ; N λ Ω and finally their applications to the well-known two-phase Stefan problem.

BV and Nikolskii spaces Interpolation theory Stefan problem provider bdim
0344.46071 BERGH, J. - LÖFSTRÖM, J., Interpolation Spaces. Springer-Verlag, Berlin-New York 1976. 1267875 0809.46026 BERNARDI, M. P. - BONDIOLI, C., Alcune osservazioni sugli spazi di Nikolskii. Rend. Ist. Lomb. Sc., A, 126, 1992, 93-104. BERNARDI, M. P. - BONDIOLI, C., Nikolskii spaces and the BV space characterized by motions in \( \mathbb{R}^{N} \) R N . 1994, to appear. BESOV, O. V. - ILIN, V. P. - NIKOLSKII, S. M., Integral Rappresentation of Functions and Imbedding Theorems. Vol. II. V.H. Winston & Sons, 1979. 1186914 0772.46015 BONDIOLI, C., Function spaces of Nikolskii type on compact manifolds. Rend. Mat. Acc. Lincei, s. 9, v. 3, 1992, 185-194. 1273338 0837.35035 10.1002/mana.19941660121 BONDIOLI, C., A regularity result of Nikolskii type for an evolution equation on compact homogeneous spaces. Mathematische Nachrichten, 166, 1994, 273-285. 697382 0511.46001 BREZIS, H., Analyse fonctionelle. Masson, Paris 1983. 558852 0434.31001 BUI HUY QUI, , Remark on the dual of some Lipschitz spaces. Hiroshima Math. J., 10, 1980, 163-173. 230022 0164.43702 BUTZER, P. L. - BERENS, H., Semi-Groups of Operators and Approximation. Springer-Verlag, Berlin-New York 1967. 874846 0668.35088 DAMLAMIAN, A., On the Stefan problem. The variational approach and some applications. Math. Models and Methods in Mechanics, Banach center publ., vol. 15, Warsaw 1985, 253-275. 453964 0369.46039 DIESTEL, J. - UHL JR, J. J., Vector Measures. Am. Math. Soc., Providence 1977. 775682 0545.49018 GIUSTI, E., Minimal Surfaces and Functions of Bounded Variation. Birkhäuser Inc., Boston 1984. 0756.35119 GÖTZ, I. G. - ZALTZMAN, B. B., Nonincrease of a mushy region in a nonhomogeneous Stefan problem. Quarterly of applied Math., vol. XLIX, 4, 741-746. HUANG, S., Regularity of the enthalpy for two-phase Stefan problem in several space variables. Preprint 1992. 276438 0179.46303 IONESCU TULCEA, A. - IONESCU TULCEA, C., Topics in the Theory of Lifting. Springer-Verlag, Berlin-New York 1969. 241822 0174.15403 LADYZHENSKAYA, O. A. - SOLONNIKOV, V. - URALCEVA, N., Linear and Quasilinear Equations of Parabolic Type. Trans. Math. Monographs, 23, 1968. 350177 0223.35039 LIONS, J. L. - MAGENES, E., Non-Homogeneous Boundary Value Problems and Applications. Vol. I. Springer-Verlag, Berlin-New York 1972. 165343 0148.11403 LIONS, J. L. - PEETRE, J., Sur une classe d'espace d'interpolation. Inst. Hautes Etudes Sci. Publ. Math., 19, 1964, 5-68. 215082 0178.16501 MAGENES, E., Spazi di interpolazione ed equazioni alle derivate parziali. Atti del VII Congresso dell'Unione Matematica Italiana, Genova 1963, 134-197. 1025097 0738.65092 10.1137/0726083 MAGENES, E. - VERDI, C. - VISINTIN, A., Some theoretical and numerical results on the two-phase Stefan problem. SIAM J. Numer. Anal., 26, 1989, 1425-1438. 1085487 0694.41037 MEYER, Y., Ondelettes. Ondelettes et opérateurs I. Hermann, Paris 1990. 163159 0132.09402 TAIBLESON, M. H., On the theory of Lipschitz spaces of distributions on Euclidean n-spaces I. Principal Properties. J. Math. Mech., 13, 1964, 407-479. 592100 0472.73031 10.1007/BF00284617 TEMAM, R. - STRANG, G., Function of bounded deformation. Archive Rat. Mech. and Analysis, 75, 1980, 7-21. 503903 0387.46032 TRIEBEL, H., Interpolation Theory, Function Spaces, Differential Operators. North-Holland, Amsterdam-New York 1978. 1267870 0801.35158 VERDI, C., BV regularity of the entalpy for semidiscrete two-phase Stefan problems. Rend. Ist. Lomb. Sc, A, 126, 1992, 29-42. 631569 0471.35078 VISINTIN, A., Sur le problème de Stefan avec flux non linéaire. Boll. Un. Mat. Ital., C(6), 18, 1981, 63-86.
oai:bdim.eu:RLIN_1993_9_4_1_63_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1993_9_4_1_63_0 Contributo di diaframmi orizzontali alla resistenza sismica di strutture murarie a navata Strengthening performances of lattice diaphragms against seismic actions on monumental masonry buildings Bruzzese Eugenio Russo Spena Francesco Sparacio Renato 1993 3 4 RLIN_1993_9_4 9 1 RLIN_1993_9_4_1 63 77 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Con riferimento a configurazioni geometriche schematiche di strutture murarie tipiche dell'edilizia monumentale si analizzano gli stati tensionali di carattere prevalentemente flessionale indotti nelle pareti verticali da azioni orizzontali da sisma. L'analisi è finalizzata alla definizione quantitativa della efficacia di interventi di integrazione statica che prevedono l'inserimento di un traliccio orizzontale in acciaio al livello del piano di gronda del tetto, capace di costituire diaframma orizzontale in copertura e di trasferire le azioni orizzontali sulle pareti di testata. Si descrive la metodologia di calcolo utilizzata, e si illustrano i risultati delle analisi eseguite.

The paper deals with the problem concerning the retrofitting and rehabilitation of the architectural heritage of monumental value. In sect. 1 the state-of-art and technical implications concerning hystorical masonry buildings in seismic areas are presented. Section 2 is devoted to the formulation of the mathematical model needed for the analysis of this class of structures. Referring to an effective situation, paradigmatic for the class of structures in argument, computational results of technical interest are presented. Finally, in Appendix, the problem weak formulation is given and the computational solution algorithm based on discretization using non-conforming bi-cubic flat-shell finite elements is presented in full detail.

Non-linear mechanics Structural reliability Restoring and retrofitting provider bdim
0485.73076 ROMANO, G. - ROMANO, M., Sulla soluzione di problemi strutturali in presenza di legami costitutivi unilaterali. Atti Acc. Lincei Rend. fis., s. 8, vol. 67, 1979, 104-113. BARATTA, A. - TOSCANO, R., Stati tensionali in pannelli di materiale non resistente a trazione. Atti VI Congr. Naz.le AIMETA, Genova 1982. DI PASQUALE, S., Questioni di meccanica dei solidi non reagenti a trazione. Atti VI Congr. Naz.le AIMETA, Genova 1982. ROMANO, G. - SACCO, E., Sul calcolo di strutture non resistenti a trazione. Atti VI Congr. Naz.le AIMETA, Genova 1982. MAIER, G. - NAPPI, A., A Theory of Perfectly No-tension Discretized Structural System. In: Scritti in onore di S. Dei Poli. Tamburini, Milano 1986. RUSSO SPENA, F. - SPARACIO, R., Metodi numerici per l'analisi tensionale di pareti murarie. Atti Congr. Int.: lo stato dell'arte in Italia sulla meccanica delle murature. Dipartimento di Ingegneria Civile, II Università di Roma, 1985. BAZAN, E. - PADELLA, M. - MELI, R., Siguridad ante sismas de casa de adobe. Techn. Rep. 107, Institute» de Ingegneria, Universitad Nacional de Mexico, 1979. SCAWTHORN, C. - BECKER, A., Relative Benefits of Alternative Strengthening Methods for Low Strength Masonry Buildings. 3th U.S. Conf. on Earthquake Eng., Charleston, S. Carolina, 1986. WALZ, J. E. - FULTON, R. E. - CYRUS, N. J., Accuracy and Convergence of Finite Element Approximations. Proc. 2nd Conf. on Matrix Methods in Struct. Mech. AFFDL TR 1968, 68-150. 455469 GALLAGHER, R. H., Finite Elements Analysis: Fundamentals. Prentice Hall Inc. Englewood Cliff, N.J., 1975.
oai:bdim.eu:RLIN_1994_9_5_1_43_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1994_9_5_1_43_0 Angular limits and derivatives for holomorphic maps of infinite dimensional bounded homogeneous domains Limiti e derivate angolari per le applicazioni olomorfe di domini limitati omogenei di dimensione infinita Włodarczyk Kazimierz 1994 3 5 RLIN_1994_9_5 9 1 RLIN_1994_9_5_1 43 53 1273892 0802.46060 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

An infinite dimensional extension of the Pick-Julia theorem is used to derive the conditions of Carathéodory type which guarantee the existence of angular limits and angular derivatives for holomorphic maps of infinite dimensional bounded symmetric homogeneous domains in \( J^{*} \) J * -algebras and in complex Hilbert spaces. The case of operator-valued analytic maps is considered and examples are given.

Da un'estensione di dimensione infinita del teorema di Pick-Julia vengono dedotte condizioni, «alla Carathéodory», sufficienti per l'esistenza di limiti angolari e derivate angolari per applicazioni olomorfe di domini limitati omogenei simmetrici in algebre \( J^{*} \) J * ed in spazi di Hilbert. Si considerano alcuni esempi e si studiano funzioni analitiche i cui valori sono degli operatori.

Infinite dimensional bounded symmetric homogeneous domain Holomorphic map Operator-valued analytic map Angular derivative \( J^{*} \)-algebra provider bdim
357743 0272.30012 AHLFORS, L. V., Conformal invariants: topics in geometric function theory. McGraw-Hill, New York 1973. 542181 0389.47004 10.1007/BF01214433 ANDO, T. - FAN, KY, Pick-Julia theorems for operators. Math. Z., 168, 1979, 23-34. 1083446 0682.30023 10.1112/jlms/s2-42.2.279 BARTH, K. F. - RIPPON, P. J. - SONS, L. S., Angular limits of holomorphic and meromorphic functions. J. London Math. Soc., (2), 42, 1990, 279-291. 1062778 0701.30028 BERMAN, R. D., Angular limits and infinite asymptotic values of analytic functions of slow growth. Ill. J. Math., 34, 1990, 845-858. 0047.07905 CARATHÉODORY, C., Conformal representations. Cambridge Tracts in Mathematics and Mathematical Physics, Cambridge 1952. 55.0209.02 CARATHÉODORY, C., Über die Winkelderivierten von beschrankten analytischen Functionen. Sitz. Ber. Preuss. Akad., Phys.-Math., IV, 1929, 1-18. 0056.06703 CARATHÉODORY, C., Theory of functions. Vol. 2. Chelsea Publishing Company, New York 1960. 0011.12302 CARTAN, E., Sur les domaines bornés homogènees de l'espace de n variables complexes. Abh. Math. Sem. Univ. Hamburg, 11, 1935, 116-162. 815033 0588.47018 FAN, KY, The angular derivative of an operator-valued analytic function. Pacific J. Math., 121, 1986, 67-72. 1191814 0765.30018 10.1007/BF01535575 GARDINER, S. J., Angular limits of holomorphic functions which satisfy an integrability condition. Monatsh. Math., 114, 1992, 97-106. 1180889 0755.30031 10.1112/jlms/s2-46.1.140 GIRELA, D., Non-tangential limits for analytic functions of slow growth in a disc. J. London Math. Soc., (2), 46, 1992, 140-148. 164041 0101.29702 GOLDBERG, J. L., Functions with positive real part in a half plane. Duke Math. J., 29, 1962, 333-339. 407330 0293.46049 HARRIS, L. A., Bounded symmetric homogeneous domains in infinite dimensional spaces. Lecture Notes in Mathematics, 364, Springer-Verlag, Berlin-Heidelberg-New York 1974, 13-40. 854144 0608.30050 10.4153/CJM-1986-043-4 MACCLUER, B.D. - SHAPIRO, J. H., Angular derivatives and compact composition operators on the Hardy and Bergman spaces. Canadian J. Math., 38, 1986, 878-906. 254579 0172.39902 NACHBIN, L., Topology on spaces of holomorphic mappings. Springer-Verlag, Berlin-Heidelberg-New York 1969. 279280 0199.12501 NEVANLINNA, R., Analytic functions. Springer-Verlag, Berlin-Heidelberg-New York 1970. 507768 0298.30014 POMMERENKE, CH., Univalent functions. Vandenhoeck and Ruprecht, Göttingen 1975. 601594 1139.32001 RUDIN, W., Function theory in the unit ball of \( C^{n} \) C n . Springer-Verlag, New York-Heidelberg-Berlin 1980. 946094 0635.30024 SARASON, D., Angular derivatives via Hilbert space. Complex Variables Theory Appl., 10, 1988, 1-10. 1111769 0744.46035 WLODARCZYK, K., Hyperbolic geometry in bounded symmetric homogeneous domains of \( J^{*} \) J * -algebras. Atti Sem. Mat. Fis. Univ. Modena, 39, 1991, 201-211. 875383 0621.46041 10.2307/2046348 WLODARCZYK, K., Julia's lemma and Wolffs theorem for \( J^{*} \) J * -algebras. Proc. Amer. Math. Soc., 99, 1987, 472-476. 864774 0612.46044 10.1016/0022-247X(86)90179-4 WLODARCZYK, K., Pick-Julia theorems for holomorphic maps in \( J^{*} \) J * -algebras and Hilbert spaces. J. Math. Anal. Appl., 120, 1986, 567-571. 729044 0521.46046 10.1007/BF01471215 WLODARCZYK, K., Some properties of analytic maps of operators in \( J^{*} \) J * -algebras. Monatsh. Math., 96, 1983, 325-330. 841432 0595.47046 10.1093/qmath/37.2.245 WLODARCZYK, K., Studies of iterations of holomorphic maps in \( J^{*} \) J * -algebras and complex Banach spaces. Quart. J. Math. Oxford, 37, 1986, 245-256. 976528 0665.46034 WLODARCZYK, K., The angular derivative of Fréchet-holomorphic maps in \( J^{*} \) J * -algebras and complex Hilbert spaces. Proc. Kon. Nederl. Akad. Wetensch., A91, 1988, 455-468; Indag. Math., 50, 1988, 455-468. 1250495 0817.46048 WLODARCZYK, K., The Julia-Carathéodory theorem for distance-decreasing maps on infinite dimensional hyperbolic spaces. Rend. Mat. Acc. Lincei, s. 9, v. 4, 1993, 171-179.
oai:bdim.eu:RLIN_1992_9_3_3_195_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1992_9_3_3_195_0 Su alcune proprietà delle funzioni convesse On some properties of convex functions Ambrosio Luigi 1992 9 3 RLIN_1992_9_3 9 3 RLIN_1992_9_3_3 195 202 1186915 0758.49007 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

In questo lavoro riassumiamo alcuni risultati di una ricerca riguardante le singolarità (punti di non differenziabilità) delle funzioni convesse. Questa ricerca copre vari aspetti, che vanno dalla stima della dimensione di Hausdorff di certi tipi di singolarità fino allo studio della loro propagazione. Studiamo anche problemi di semicontinuità e rilassamento collegati all'area del grafico del gradiente di una funzione convessa e l'esistenza dei determinanti, in senso debole, dei minori della matrice Hessiana.

In this paper we summarize recent results of a research concerning the singularities (non differentiability points) of convex functions. This research covers various aspects, from the estimate of the Hausdorff dimension of some kinds of singularities to the study of their propagation. We study also semicontinuity and relaxation problems related to the area of the graph of the gradient of a convex function and the existence of weak determinants of the minors of the Hessian matrix.

Convex functions Semicontinuity Relaxation Propagation of singularities HamiltonJacobi equations provider bdim
1185029 0784.49011 10.1007/BF02567770 ALBERTI, G. - AMBROSIO, L. - CANNARSA, P., On the singularities of convex functions. Preprint Scuola Normale Superiore, n. 119, 1991, in corso di stampa su: Manuscripta Mathematica. AMBROSIO, L. - CANNARSA, P. - SONER, H. M., On Hamilton-Jacobi-Bellman the propagation of singularities of solutions to equations. 1992, in corso di stampa. ALBERTI, G. - AMBROSIO, L., Weak determinants and monotone functions. 1992, in corso di stampa. 0799.49028 ANZELLOTTI, G. - SERAPIONI, R., \( C^{k} \) C k -rectifiable sets. Preprint Università di Trento, 1991. 905608 0612.70016 10.1512/iumj.1987.36.36028 CANNARSA, P. - SONER, H. M., On the singularities of the viscosity solutions to Hamilton-Jacobi-Bellman equations. Indiana Univ. Math. J., 36, 1987, 501-524. 709590 0582.49001 CLARKE, F. H., Optimization and Nonsmooth Analysis. Wiley & Sons, New York 1983. 0895.49019 DE GIORGI, E., Geometric Measure Theory and Calculus of Variations. Proceedings of the Conference on New Developments in PDE and Applications to Mathematical Physics (Ferrara, 14-18 ottobre 1991), Plenum Press, in corso di stampa. 257325 0874.49001 FÉDÉRER, H., Geometric Measure Theory. Springer Verlag, Berlin 1969. 235269 0172.13901 FLEMING, W. H., The Cauchy problem for a nonlinear first order partial differential equation. J. Differential Equations, 5, 1969, 515-530. FU, J. H. G., Monge Ampere functions I. Preprint CMA, Australian National University, 1988. FU, J. H. G., Monge Ampere functions II. Preprint CMA, Australian National University, 1988. 980756 0677.73014 10.1007/BF00251429 GIAQUINTA, M. - MODICA, G. - SOUCEK, J., Cartesian currents, weak diffeomorphisms and existence theorems in non-linear elasticity. Arch. Rational Mech. Anal., 106, 1989, 97-159. 667669 0497.35001 LIONS, P. L., Generalized solutions of Hamilton-Jacobi equations. Pitman, Boston 1982. 933756 0819.49024 MORGAN, F., Geometric Measure Theory - A beginners guide. Academic Press, Boston 1988. 0176.12001 RESHETNYAK, Y. G., Generalized derivative and differentiability almost everywhere. Math. USSR Sbornik, 4, 1968, 293-302. 274683 0193.18401 ROCKAFELLAR, R. T., Convex Analysis. Princeton University Press, Princeton 1970. 1176362 0766.46016 10.1007/BF00375119 SBORDONE, C. - IWANIEC, T., On the integrability of the Jacobian under minimal hypotheses. Preprint del Dipartimento di Matematica di Napoli, 1991. 756417 0546.49019 SIMON, L., Lectures on Geometric Measure Theory. Proceedings of the Centre for Mathematical Analysis, Australian National University, Canberra 1983.
oai:bdim.eu:RLIN_1994_9_5_3_223_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1994_9_5_3_223_0 On a nonlinear equation of the vibrating string Su un'equazione non lineare della corda vibrante Iannelli Angela Prouse Giovanni Veneziani Alessandro 1994 9 5 RLIN_1994_9_5 9 3 RLIN_1994_9_5_3 223 228 1298265 0824.35076 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

A nonlinear model of the vibrating string is studied and global existence and uniqueness theorems for the solution of the Cauchy-Dirichlet problem are given. The model is then compared to the classical D'Alembert model and to a nonlinear model due to Kirchhoff.

Si studia un modello non lineare della corda vibrante e si enunciano teoremi di esistenza ed unicità in grande della soluzione del problema di Cauchy-Dirichlet. Si esegue poi un confronto tra questo modello ed i modelli di D'Alembert e di Kirchhoff.

Vibrating string Weak solution Approximate solution provider bdim
0585.00001 AMERIO, L., Analisi matematica con elementi di Analisi Funzionale. Vol. 3, parte 2. UTET, Torino 1982. 0425.73061 PROUSE, G. - ROLANDI, F. - ZARETTI, A., Sulla corda e verga vibranti. Quad. IAC, III, vol. 111, Roma 1977. 1371099 0844.35067 10.1007/BF01194221 IANNELLI, A. - PROUSE, G. - VENEZIANI, A., Analysis of a nonlinear model of the vibrating string. Nonlinear Differential Equations and Applications, to appear. 1293773 0809.35061 10.1007/BF02925435 SPAGNOLO, S., The Cauchy problem for Kirchhoff equations. Proc. 2nd International conference on Partial differential equations in honour of Luigi Amerio. Rend. Sem. Mat. Fis. Milano 1992, 17-52. 1414220 AROSIO, A., Averaged evolution equations. The Kirchhoff string and its treatment in scales of Banach spaces. Proc. 2nd workshop on Functional analysis. World Scientific, Singapore 1993, to appear. 336014 0353.70028 FERMI, E. - PASTA, J. - ULAM, S., Studies of nonlinear problems. Am. Math. Soc. Lectures in Appl. Math., vol. 15, New York 1974.
oai:bdim.eu:RLIN_1991_9_2_3_197_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1991_9_2_3_197_0 Sulle partizioni dei \( p \) p -gruppi finiti. II On the partitions of finite \( p \) p -groups. II Pannone Virgilio 1991 9 2 RLIN_1991_9_2 9 3 RLIN_1991_9_2_3 197 201 1135421 0811.20016 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Si studiano le partizioni dei \( p \) p -gruppi finiti e, in particolare, quelle con molti componenti di un dato ordine. Si deriva una condizione necessaria (Teorema 1) per l'esistenza di tali partizioni in termini di gradi dei caratteri irriducibili. Si deducono quindi alcuni corollari e si dà un'applicazione ai gruppi di matrici unitriangolari (Proposizione 3).

Partitions of finite \( p \) p -groups are investigated, especially partitions with many components of a given order. A necessary condition is obtained (Theorem 1) for the existence of such partitions in terms of degrees of the irreducible characters. Some corollaries are then deduced, and an application is given to the groups of unitriangular matrices (Proposition 3).

Partition p-group Character provider bdim
151507 0103.01404 BAER, R., Partitionen endlicher Gruppen. Math. Zeit., 75, 1961, 333-373. 241524 0155.05502 ISAACS, I. M. - PASSMAN, D. S., A characterization of groups in terms of the degrees of their characters. II. Pac. J. Math., 24, 1968, 467-510. 460423 0849.20004 ISAACS, I. M., Character theory of finite groups. New York 1976. 335637 0235.20021 ISAACS, I. M., Equally partitioned groups. Pac. J. Math., 49, 1973, 109-116. KONTOROVICH, P., Gruppi con base di decomposizione. Mat. Sb., T. 12(54), N. 1, 1943, 56-70 (in russo). 387438 0315.20044 LINDSTRÖM, B., Group partitions and mixed perfect codes. Can. Math. Bull., (1) 18, 1975, 57-60. 0677.20016 PANNONE, V., Sulle partizioni dei \( p \) p -gruppi finiti. Atti Acc. Lincei Rend. fis., s. 8, vol. 82, fasc. 1, 1988, 1-5. 1080222 0713.20016 10.1007/BF01766985 PANNONE, V., On the equipartitions of finite groups. Ann. Mat. Pura e Appl., s. 4, 156, 1990, 323-339.
oai:bdim.eu:RLIN_1997_9_8_3_229_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1997_9_8_3_229_0 Addition to the Fichera paper OLEINIK OLGA A. 1997 10 8 RLIN_1997_9_8 9 3 RLIN_1997_9_8_3 229 229 1611625 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu) provider bdim
oai:bdim.eu:RLIN_1994_9_5_4_303_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1994_9_5_4_303_0 On fixed points of \( C^{1} \) C 1 extensions of expanding maps in the unit disc Punti fissi di estensioni \( C^{1} \) C 1 di funzioni espansive nel disco unitario Tauraso Roberto 1994 12 5 RLIN_1994_9_5 9 4 RLIN_1994_9_5_4 303 308 1320582 0827.30022 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Using a result due to M. Shub, a theorem about the existence of fixed points inside the unit disc for \( C^{1} \) C 1 extensions of expanding maps defined on the boundary is established. An application to a special class of rational maps on the Riemann sphere and some considerations on ergodic properties of these maps are also made.

Sulla base di un risultato di M. Shub, si dimostra un teorema riguardante la presenza di punti fissi all'interno del disco unitario per estensioni \( C^{1} \) C 1 di funzioni espansive definite sul bordo. La Nota si conclude con un'applicazione ad una classe di funzioni razionali della sfera di Riemann e alcune considerazioni sulle proprietà ergodiche di tali funzioni.

Fixed point Expanding map Blaschke product Invariant measure provider bdim
1098711 0747.32002 ABATE, M., Iteration Theory of Holomorphic Maps on Taut Manifolds. Mediterranean Press, Commenda di Rende 1989. 194595 0127.03401 BROLIN, H., Invariant sets under iteration of rational function. Ark. Mat., vol. 6, 1965, 103-144. 283793 0216.19601 BROWN, R. F., The Lefschetz Fixed Point Theorem. Scott, Foresman and Co., Glenview 1971. 1252704 0813.54030 10.2307/2325123 BROWN, R. F. - GREENE, R. E., An interior fixed point property of the disc. Amer. Math. Monthly, vol. 101, 1994, 39-47. 1031780 0688.55002 10.1007/BFb0086438 BROWN, R. F. - GREENE, R. E. - SCHIRMER, H., Fixed points of map extension. In: Topological Fixed Point Theory and Applications. Prooceedings (Tianjin, 1988). Lecture Notes in Mathematics, vol. 1411, Springer-Verlag, Berlin 1989. 622955 0466.30001 10.2307/2321822 BURCKEL, R. B., Iterating analytic self-maps of discs. Amer. Math. Monthly, vol. 88, 1981, 387-460. 696379 0625.54002 GAMELIN, T. W. - GREENE, R. E., Introduction to Topology. Saunders College Publ., Philadelphia 1983. 703758 0487.28017 10.1112/blms/15.4.343 MARTIN, N. F. G., On Finite Blaschke Products whose restriction to the unit circle are exact endomorphisms. Bull. London Math. Soc., vol. 15, 1983, 343-348. 649788 0246.58012 NITECKI, Z., Differentiable Dynamics. The M.I.T. Press, Cambridge, Mass. 1971. 1217706 0762.30001 POMMERENKE, C., Boundary behaviour of Conformal Maps. Springer-Verlag, New York 1992. 210528 0925.00005 RUDIN, W., Real and Complex Analysis. McGraw-Hill, New York 1966. 240824 0201.56305 SHUB, M., Endomorphisms of compact differentiable manifolds. Amer. J. Math., vol. 91, 1969, 175-199. 1224235 0773.58010 10.1515/9783110889314 STEINMETZ, N., Rational Iteration. De Gruyter, Berlin 1993. 466493 0375.28009 WALTERS, P., Invariant measures and equilibrium states for some mappings which expand distances. Trans. Amer. Math. Soc., vol. 236, 1978, 121-153. 648108 0299.28012 WALTERS, P., An Introduction to Ergodic Theory. Springer-Verlag, New York 1982.
oai:bdim.eu:RLIN_1993_9_4_4_265_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1993_9_4_4_265_0 Multiplicity of homoclinic orbits for a class of asymptotically periodic Hamiltonian systems Molteplicità di orbite omocline per sistemi hamiltoniani asintoticamente periodici Montecchiari Piero 1993 12 4 RLIN_1993_9_4 9 4 RLIN_1993_9_4_4 265 271 1269616 0802.34052 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

We prove the existence of infinitely many geometrically distinct homoclinic orbits for a class of asymptotically periodic second order Hamiltonian systems.

Si dimostra l'esistenza di infinite orbite omocline geometricamente distinte per una classe di sistemi Hamiltoniani del secondo ordine asintoticamente periodici.

Hamiltonian systems Homoclinic orbits Multibump solutions Minimax argument provider bdim
1206338 0796.35043 10.1512/iumj.1992.41.41052 ALAMA, S. - LI, Y. Y., On «Multibump» Bound States for Certain Semilinear Elliptic Equations. Research Report No. 92-NA-012. Carnegie Mellon University, 1992. 1164129 0766.49006 AMBROSETTI, A., Critical points and nonlinear variational problems. Bul. Soc. Math. France, 120, 1992. 1070929 0731.34050 10.1007/BF01444526 COTI ZELATI, V. - EKELAND, I. - SÉRÉ, E., A Variational approach to homoclinic orbits in Hamiltonian systems. Math. Ann., 288, 1990, 133-160. 1119200 0744.34045 10.2307/2939286 COTI ZELATI, V. - RABINOWITZ, P. H., Homoclinic orbits for second order hamiltonian systems possessing superquadratic potentials. J. Amer. Math. Soc., 4, 1991, 693-727. 1079873 0702.34039 10.1007/BF01444543 HOFER, H. - WISOCKI, K., First order elliptic systems and the existence of homoclinic orbits in Hamiltonian systems. Math. Ann., 288, 1990, 483-503. 834360 0704.49005 10.4171/RMI/6 LIONS, P.L., The concentration-compactness principle in the calculus of variations. Rev. Math. Iberoam., 1, 1985, 145-201. 1378249 0849.34035 10.1007/BF01759265 MONTECCHIARI, P., Existence and multiplicity of homoclinic orbits for a class of asymptotically periodic second order Hamiltonian systems. Preprint S.I.S.S.A., 1993. 1051605 0705.34054 10.1017/S0308210500024240 RABINOWITZ, P. H., Homoclinic orbits for a class of Hamiltonian systems. Proc. Roy. Soc. Edinburgh, 1144, 1990, 33-38. 1143210 0725.58017 10.1007/BF02570817 SÉRÉ, E., Existence of infinitely many homoclinic orbits in Hamiltonian systems. Math. Z., 209, 1992, 27-42. 1249107 0803.58013 SÉRÉ, E., Looking for the Bernoulli shift. Preprint CEREMADE, 1992.
oai:bdim.eu:RLIN_1992_9_3_4_315_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1992_9_3_4_315_0 Determinazione dell'eccentricità addizionale in regime elasto-viscoso lineare di elementi snelli di materiale omogeneo in presenza di armatura Additional eccentricity evaluation in linear viscoelasticity of homogeneous slender columns with reinforcement Faella Ciro Nigro Emidio 1992 12 3 RLIN_1992_9_3 9 4 RLIN_1992_9_3_4 315 327 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

La valutazione degli effetti della viscosità del calcestruzzo per la verifica delle colonne snelle in e.a. può eseguirsi utilizzando il metodo dell'eccentricità addizionale, che consiste nel valutare l'incremento di freccia dovuto alla viscosità mediante una semplice relazione analitica. Tale relazione, ricavata nell'ipotesi di materiale omogeneo a comportamento elasto-viscoso lineare, può condurre a risultati molto conservativi, dal momento che non considera la presenza delle armature metalliche, che riducono le deformazioni viscose. Nel presente lavoro si perviene ad una relazione analitica modificata per valutare l'eccentricità addizionale, diversa da altre riportate in bibliografia, che tiene conto della presenza delle armature metalliche e che fornisce un valore dell'eccentricità addizionale dipendente anche dall'inerzia della sezione omogeneizzata. Dai confronti eseguiti con metodologie più esatte si deduce che la formulazione proposta risulta soddisfacente, in quanto riduce fortemente la conservatività del metodo originario, mantenendo il pregio della semplicità di applicazione.

The evaluation of the creep concrete effects for the check of slender r.c. columns can be obtained with the creep eccentricity method, which expresses the increase of the displacement due to the creep by means of a simple formula. This formula is deduced for homogeneous material with linear viscoelastic behaviour and leads generally to very conservative results, because does not take into account the reinforcements, which reduce the viscous deformations. In this work it is derived a modified formula for the additional eccentricity evaluation, different from others referred in bibliography, which takes into account the reinforcements and gives a value of the additional eccentricity depending also on the homogenized section inertia. From some comparisons with more exact methodologies it is deduced that the proposed formulation is satisfying, because it reduces strongly the conservativity of the original method, preserving the characteristic of simple application.

Buckling Linear viscoelasticity Reinforced concrete provider bdim
C.E.B., - F.I.P., , Model Code 1990. First Draft, Bulletin d'information n. 195-196, Marzo 1990. C.N.R., , Bollettino ufficiale, Istruzioni per la progettazione e l'esecuzione delle opere in cemento armato e cemento precompresso con il metodo semiprobabilistico agli stati limite. 1982. CREAZZA, G., Verifica degli elementi in c.a. ed effetti del II ordine. CISM, 1984. FAELLA, C. - NIGRO, E., Influenza dell'armatura e del modello viscoso sull'eccentricità addizionale per la verifica degli elementi snelli in c.a. Istituto di Ingegneria Civile, Università di Salerno, Rapp. n. 34, 1992. FAELLA, C. - NIGRO, E., Comportamento di elementi snelli in c.a. in regime viscoso in presenza di carichi variabili. Convegno su Problemi di Meccanica dei Materiali e delle Strutture promosso dal Gruppo di Meccanica dei Materiali e delle Strutture dell'AIMETA, Amalfi, 3-5 Giugno 1991. FAELLA, C. - NIGRO, E., Effetto delle modalità di applicazione del carico sul comportamento di elementi snelli in c.a. in regime viscoso. XX Congresso Nazionale AIAS, Palermo, 25-28 Settembre 1991. LEVI, F., L'instabilità dell'equilibrio in regime elastico-viscoso. Giornale del Genio Civile, n. 2, 1950. MACGREGOR, J. G., Stability of Reinforced Concrete Building Frames. In: Concrete Framed Structures: Stability and Strength. Elsevier Applied Science Publishers, 1986, Chapter 1. MOLA, F., Stato limite di instabilità - effetti della viscosità. Atti del Corso di aggiornamento su «Progetto delle strutture in cemento armato con il metodo degli stati limite», Ed. CLUP, Milano 1983. MOLA, F. - IORI, I., Influenza della viscosità sulla deformabilità di sezioni in cemento armato soggette a pressoflessione. Studi e Ricerche, vol. 1, Corso di Perfezionamento per le Costruzioni in Cemento Armato F.lli Pesenti, Politecnico di Milano, 1979. MOLA, F. - PISANI, M. A., L'influenza delle caratteristiche dei modelli reologia sulla capacità portante ultima di elementi snelli in c.a. sotto azioni di lunga durata. Studi e Ricerche, vol. 10, Corso di Perfezionamento per le Costruzioni in Cemento Armato F.lli Pesenti, Politecnico di Milano, 1988. 134026 TIMOSHENKO, S. P. - GERE, J. M., Theory of Elastic Stability. Ed. McGRAW-HILL, 2nd ed., New York 1961.
oai:bdim.eu:RLIN_1998_9_9_4_279_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1998_9_9_4_279_0 On the Cauchy problem for a class of parabolic equations with variable density Sul problema di Cauchy per una classe di equazioni paraboliche con densità variabile Kamin Shoshana Kersner Robert Tesei Alberto 1998 12 9 RLIN_1998_9_9 9 4 RLIN_1998_9_9_4 279 298 1722787 0926.35045 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

The well-posedness of the Cauchy problem for a class of parabolic equations with variable density is investigated. Necessary and sufficient conditions for existence and uniqueness in the class of bounded solutions are proved. If these conditions fail, sufficient conditions are given to ensure well-posedness in the class of bounded solutions which satisfy suitable constraints at infinity.

Si studia la buona posizione del problema di Cauchy per una classe di equazioni paraboliche con densità variabile. Si ricavano condizioni necessarie e sufficienti per l’esistenza e l’unicità nella classe delle soluzioni limitate. Se tali condizioni non sono verificate, si danno condizioni sufficienti a garantire la buona posizione del problema nella classe delle soluzioni limitate che all’infinito soddisfano opportune restrizioni.

Cauchy problem Well-posedness Conditions at infinity provider bdim
176231 0137.29403 Aronson, D. G., Uniqueness of positive weak solutions of second order parabolic equations. Ann. Polon. Math., 16, 1965, 285-303. 678053 0518.35050 10.1016/0362-546X(82)90072-4 Aronson, D. G. - Crandall, M. - Peletier, L. A., Stabilization of solutions in a degenerate nonlinear diffusion problem. Nonlin. Anal., 6, 1982, 1001-1022. 804564 0596.35073 10.1016/0362-546X(85)90081-1 Bertsch, M. - Kersner, R. - Peletier, L. A., Positivity versus localization in degenerate diffusion equations. Nonlin. Anal., 9, 1985, 987-1008. Borok, V. M. - Zitomirskii, Ja. I., Cauchy problem for parabolic systems, degenerating at infinity. Zap. Mech. Mat. Fak. Chark. Gos. Univ. im Gorkogo i Cark. Mat. Obzhestva, 29, 1963, 5-15 (in Russian). 252806 0181.37403 Eidel'man, S. D., Parabolic systems. North-Holland, Amsterdam 1969. 1047572 0707.35074 10.1016/0022-0396(90)90081-Y Eidus, D., The Cauchy problem for the nonlinear filtration equation in an inhomogeneous medium. J. Differ. Equations, 84, 1990, 309-318. 1125232 0762.35020 10.1016/0022-1236(91)90117-N Eidus, D., The perturbed Laplace operator in a weighted \( L^{2} \) L 2 . J. Funct. Anal., 100, 1991, 400-410. 1169025 0791.35065 10.2307/2160476 Eidus, D. - Kamin, S., The filtration equation in a class of functions decreasing at infinity. Proc. Amer. Math. Soc., 120, 1994, 825-830. 47886 0047.09303 Feller, W., The parabolic differential equations and the associated semi-groups of transformations. Ann. Math., 55, 1952, 468-519. 833742 0568.60057 Freidlin, M., Functional integration and partial differential equations. Princeton University Press, Princeton 1985. 104907 0086.30001 Friedman, A., On the uniqueness of the Cauchy problem for parabolic equations. Amer. J. Math., 81, 1959, 503-511. 133871 0106.12001 Hasminsky, R. Z., Ergodic properties of recurrent diffusion processes and stabilization of the solution of the Cauchy problem for parabolic equations. Theory Prob. Appl., 5, 1970, 196-214 (in Russian). 32119 0036.08801 Hille, E., Les probabilités continues en chaîne. C.R. Acad. Sci. Paris, 230, 1950, 34-35. 50.0337.02 Holmgren, E., Sur les solutions quasianalytiques de l’équation de la chaleur. Ark. Mat., 18, 1924, 64-95. Il'in, A. M. - Kalashnikov, A. S. - Oleinik, O. A., Linear equations of the second order of parabolic type. Russian Math. Surveys, 17, 1962, 1-144. 637497 0469.35060 10.1002/cpa.3160350106 Kamin, S. - Rosenau, P., Non-linear diffusion in a finite mass medium. Comm. Pure Appl. Math., 35, 1982, 113-127. 632819 0501.35040 Kamynin, L. I. - Himtsenko, B., On Tikhonov-Petrowsky problem for second order parabolic equations. Sibirsky Math. J., 22, 1981, 78-109 (in Russian). 1490820 0899.35014 Lunardi, A., Schauder theorems for linear elliptic and parabolic problems with unbounded coefficients in \( \mathbb{R}^{n} \) R n . Studia Math., 128, 1998, 171-198. 1362880 0843.35036 10.1006/jdeq.1995.1167 Murata, M., Non-uniqueness of the positive Cauchy problem for parabolic equations. J. Differ. Equations, 123, 1995, 343-387. Petrowsky, I. G., On some problems in the theory of partial differential equations. Usp. Mat. Nauk, 1, 1946, 44-70 (in Russian). 1421956 0869.35010 10.1007/PL00004275 Pinchover, Y., On uniqueness and nonuniqueness of the positive Cauchy problem for parabolic equations with unbounded coefficients. Math. Z., 223, 1996, 569-586. 1326606 0858.31001 10.1017/CBO9780511526244 Pinsky, R. G., Positive harmonic functions and diffusion. Cambridge University Press, Cambridge 1995. 199563 0152.30101 Smirnova, G. N., The Cauchy problem for degenerate at infinity parabolic equations. Math. Sb., 70, 1966, 591-604 (in Russian). 287167 0243.35050 Sonin, I. M., On the classes of uniqueness for degenerate parabolic equations. Math. Sb., 85, 1971, 459-473 (in Russian). 62.1186.01 Täcklind, S., Sur les classes quasianalytiques de solutions des équations aux derivées partielles du type parabolique. Nord. Acta Reg. Soc. Sci. Uppsal., 10, 1936, 3-55. 0012.35501 61.1203.05 Tikhonov, A. N., Théorèmes d’unicité pour l’équation de la chaleur. Math. Sb., 42, 1935, 199-216. 9795 0061.22303 Widder, D. V., Positive temperatures on an infinite rod. Trans. Amer. Math. Soc., 55, 1944, 85-95. 0153.41601 Zitomirski, Ja. I., Uniqueness classes for solutions of the Cauchy problem. Soviet. Math. Dokl., 8, 1967, 259-262.
oai:bdim.eu:RLIN_1993_9_4_1_3_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1993_9_4_1_3_0 Teoria degli operatori intermedi e applicazioni: statica elastica con coefficienti discontinui, il problema delle tensioni Theory and applications of intermediate operators: elastostatics with discontinuous coefficients, the problem of the tensions Lanzara Flavia 1993 3 4 RLIN_1993_9_4 9 1 RLIN_1993_9_4_1 3 27 1225883 0785.73016 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Viene applicata la teoria della Nota I al problema al contorno dell'elastostatica quando sul contorno vengono prescritte forze nulle. I coefficienti elastici sono supposti solo limitati e misurabili. Viene fatta un'analisi dettagliata per determinare l'operatore base.

The theory of Note I is applied to the boundary value problem of Elastostatics when vanishing forces are given on the boundary. The elastic coefficients are only supposed to be bounded and measurable. A detailed analysis is carried out for determining the base operator.

Elastostatics with discontinuous coefficients Green's operator Green's matrix provider bdim
0406.73021 CASTELLANI RIZZONELLI, P., Sul calcolo delle autofrequenze di un corpo elastico libero al bordo e con coefficienti elastici discontinui. Rend. Mat., s. VI, vol. 11, Roma 1978, 495-519. 158312 0107.31105 PAYNE, L. E. - WEINBERGER, H. F., On Korn's Inequality. Arch. Rat. Mech. Anal., vol. 8, n. 1, 1961, 89-98. 0692.73020 CIALDEA, A., Formule di maggiorazione e teoremi di completezza relativi al sistema dell'elasticità tridimensionale. Riv. Mat. Univ. Parma, vol. 14, 4, 1988, 283-302. 11517 67.1031.04 FICHERA, G., Sviluppi in serie e teoremi di decomposizione in somma per le funzioni iperarmoniche. Rend. Circ. Mat. Palermo, vol. LXIII, 1941, 41-64. 178631 0146.21204 FICHERA, G., Problemi elastostatici con vincoli unilaterali: il problema di Signorini con ambigue condizioni al contorno. Atti Acc. Lincei Mem. fis., s. 8, vol. VII, sez. 1a, fasc. 5, 1964, 91-140. 54140 0053.39003 BERGMAN, S. - SCHIFFER, M., Kernel Functions and Elliptic Differential Equations in Mathematical Physics. Pure and Appl. Math., Acad. Press, New York 1953.
oai:bdim.eu:RLIN_2005_9_16_1_61_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2005_9_16_1_61_0 Discontinuous travelling wave solutions for a class of dissipative hyperbolic models Soluzioni d'onda discontinue per una classe di sistemi iperbolici dissipativi Currò Carmela Fusco Domenico 2005 3 16 RLIN_2005_9_16 9 1 RLIN_2005_9_16_1 61 71 2225923 1225.35144 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Discontinuous shock structure solutions for a general system of balance laws is considered in order to investigate the problem of connecting two equilibrium states lying on different sides of a singular barrier representing a locus of irregular singular points for travelling waves. Within such a theoretical setting a governing system of monoatomic gas is considered.

Si considerano le soluzioni di tipo struttura d'urto per un sistema di equazioni di bilancio allo scopo di studiare la connessione tra due stati di equilibrio separati nello spazio delle fasi da una barriera singolare, rappresentante un luogo di punti di singolarità nello studio delle «travelling waves». Si considerano infine le equazioni che descrivono il bilancio di un gas monoatomico uni-dimensionale dedotte nell'ambito della Termodinamica Estesa.

Shocks Singular phase plane Travelling waves provider bdim
1632151 0895.00005 10.1007/978-1-4612-2210-1 MÜLLER, I. - RUGGERI, T., Extended Thermodynamics. Springer Tracts on Natural Philosophy, 37, Springer-Verlag, New York 1993, 231 pp. (Rational Extended Thermodynamics. Springer-Verlag, new edition, 37, 1998, 393 pp.). 1463797 0878.35070 10.1007/s002050050030 BOILLAT, G. - RUGGERI, T., Hyperbolic Principal Subsystems: Entropy Convexity and Subcharacteristic Conditions. Arch. Rat. Mech. Anal., 137, 1997, 304-320. 116141 0125.06002 GODUNOV, S.K., An interesting class of quasilinear systems. Sov. Math., 2, 1961, 947-948. 285799 0229.35061 FRIEDRICHS, K.O. - LAX, P.D., Systems of conservation equation with a convex extension. Proc. Nat. Acad. Sci. USA, 68, 1971, 1686-1688. 342870 0279.35058 BOILLAT, G., Sur l'existence et la recherche d'équations de conservation supplémentaires pour les systémes hyperboliques. C.R. Acad. Sciences Paris, 278 A, 1974, 909-912. 1600900 0877.35080 10.1007/BFb0093705 BOILLAT, G., Non Linear Fields and Waves. In: T. RUGGERI (ed.), Recent Mathematical Methods in Nonlinear Wave Propagation. CIME Course (Montecatini 1994). Lecture Notes in Mathematics, 1640, Springer-Verlag, 1996, 103-152. 605357 0473.76126 RUGGERI, T. - STRUMIA, A., Main field and convex covariant density for quasi-linear hyperbolic systems. Relativistic fluid dynamics. Ann. Inst. H. Poincaré, 34 A, 1981, 65-84. 483954 0373.76001 WHITHAM, G.B., Linear and Nonlinear Waves. J. Wiley-Interscience, New York 1974, 636 pp. 1377905 10.1103/PhysRevE.47.4135 RUGGERI, T., Breakdown of shock-wave-structure solutions. Phys. Rev., E 47(6), 1993, 4135-4140. 1652858 0922.76237 10.1007/s001610050094 BOILLAT, G. - RUGGERI, T., On the shock structure problem for hyperbolic system of balance laws and convex entropy. Continuum Mech. Thermodyn., 10, 1998, 285-292. WEISS, W., Die Berechnung von kontinuierlichen Stofstrukturen in der Kinetischen Gastheorie. Habilitation thesis TU, Berlin 1997. 0194.39301 KAMKE, E., Differentialgleichungen I. Geest & Portig, Leipzig 1967. 176133 50.0639.02 BIEBERBACH, L., Theorie der gewohnlichen Differentialgleichungen. Springer-Verlag, Berlin 1965, 389 pp. 1740255 0944.34021 10.1137/S0036139998328034 MARCHANT, B.P. - NORBURY, J. - PERUMPANANI, A.J., Traveling shock waves arising in a model of malignant invasion. SIAM J. Appl. Math., 60, 2000, 463-476. 1867097 0985.92012 10.1088/0951-7715/14/6/313 MARCHANT, B.P. - NORBURY, J. - SHERRATT, J.A., Discontinuous travelling wave solutions to a haptotaxis-dominated model of malignant invasion. Nonlinearity, 14, 2001, 1653-1671. 1897286 1076.35071 10.1093/imamat/67.2.201 MARCHANT, B.P. - NORBURY, J., Discontinuous travelling wave solutions for certain hyperbolic systems. IMA J. Appl. Math., 67, 2002, 201-224. 0969.92020 PETTET, G.J. - MCELWAIN, D.L.S. - NORBURY, J., Lotka-Volterra equations with chemotaxis: walls, barriers and travelling waves. IMA J. Appl. Med. Biol., 17, 2000, 395-413. 393870 0268.35014 LAX, P.D., Shock Waves and Entropy. In: E. ZARANTONELLO (ed.), Contribution to Non Linear Functional Analysis. Acad. Press, New York 1971, 603-634. 0743.76049 RUGGERI, T., Shock waves in hyperbolic dissipative systems: non equilibrium gases. In: D. FUSCO - A. JEFFREY (eds.), Euromech colloquium 270 (Reggio Calabria, 25-28 September 1990). Pitman Research Notes in Mathematics, vol. 227, Longman, Harlow 1991. 2089842 1069.35042 10.1142/9789812702937_0018 CURRÓ, C. - FUSCO, D., Shock-like travelling wave solutions for a hyperbolic tumour growth model. In: Proceedings of XII International Conference on Waves and Stability in Continuous Media (Villasimius, Cagliari, June 1-7 2003). World Scientific, 2003, 141-147.
oai:bdim.eu:RLIN_1997_9_8_3_189_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1997_9_8_3_189_0 On the existence of periodic solutions of an hyperbolic equation in a thin domain Esistenza di soluzioni periodiche di una equazione iperbolica in un dominio sottile Johnson Russell Kamenskii Mikhail Nistri Paolo 1997 10 8 RLIN_1997_9_8 9 3 RLIN_1997_9_8_3 189 195 1611617 0910.35008 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

For a nonlinear hyperbolic equation defined in a thin domain we prove the existence of a periodic solution with respect to time both in the non-autonomous and autonomous cases. The methods employed are a combination of those developed by J. K. Hale and G. Raugel and the theory of the topological degree.

Si prova l'esistenza di soluzioni periodiche di un'equazione iperbolica smorzata definita in un dominio sottile sia nel caso autonomo che in quello non autonomo. I metodi impiegati sono una combinazione di quelli sviluppati da J. K. Hale e G. Raugel e la teoria del grado topologico.

Hyperbolic nonlinear equations Periodic solutions Topological degree provider bdim
1383978 10.1006/jdeq.1996.0051 CIUPERCA, I., Lower semicontinuity of attractors for a reaction-diffusion equation on thin domains with varying order of thinness. Preprint, Université de Paris-Sud, 1996. 1383978 0849.35049 10.1006/jdeq.1996.0051 CIUPERCA, I., Reaction-diffusion equations on thin domains with varying order of thinness. Jour. Diff. Eqns., 126, 1996, 244-291. 1432954 0877.35057 GOUROVA, I. N. - KAMENSKII, M. I., On the method of semidiscretization in periodic solutions problems for quasilinear autonomous parabolic equations. Differential Equations, 32, 1996, 101-106 (in Russian). 1040261 0761.35052 10.2307/2154084 HALE, J. - RAUGEL, G., A damped hyperbolic equation on thin domains. Trans. Am. Math. Soc., 329, 1992, 185-219. 1151557 0840.35044 HALE, J. - RAUGEL, G., Reaction-diffusion equations in thin domains. Jour. Math. Pures et Appl., 71, 1992, 33-95. 1257603 0863.58046 HALE, J. - RAUGEL, G., Limits of semigroups depending on parameters. Resenhas IME-USP, 1, 1993, 1-45. 0910.35009 JOHNSON, R. - KAMENSKII, M. I. - NISTRI, P., Existence of periodic solutions for an autonomous damped wave equation in a thin domain. Submitted. 1473860 0890.35078 10.1006/jdeq.1997.3301 JOHNSON, R. - KAMENSKII, M. I. - NISTRI, P., On periodic solutions of a damped wave equation in a thin domain using degree theoretic methods. Jour. Diff. Eqns., to appear. 385645 0145.39703 KRASNOSELSKII, M. - ZABREIKO, P. - PUSTYL'NIK, E. - SOBOLEVSKI, P., Integral Operators in Spaces of Summable Functions. Noordhooff International Publishing, Leyden 1976. 247239 KREIN, S., Linear Differential Equations in Banach Spaces. Nauka, Moscow 1967. 1374110 0851.58038 10.1007/BFb0095241 RAUGEL, G., Dynamics of partial differential equations in thin domains. Lecture Notes in Mathematics, Springer-Verlag, Berlin 1995, 1609, 208-315.
oai:bdim.eu:RLIN_1998_9_9_4_267_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1998_9_9_4_267_0 Differentiability of the transition semigroup of the stochastic Burgers equation, and application to the corresponding Hamilton-Jacobi equation Differenziabilità del semigruppo di transizione dell’equazine di Burgers stocastica e applicazione all’equazione di Hamilton-Jacobi corrispondente Da Prato Giuseppe Debussche Arnaud 1998 12 9 RLIN_1998_9_9 9 4 RLIN_1998_9_9_4 267 277 1722786 0931.37036 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

We consider a stochastic Burgers equation. We show that the gradient of the corresponding transition semigroup \( P_{t} \varphi \) P t φ does exist for any bounded \( \varphi \) φ ; and can be estimated by a suitable exponential weight. An application to some Hamilton-Jacobi equation arising in Stochastic Control is given.

Si considera un’equazione di Burgers stocastica. Si prova che il gradiente del semigruppo di transizione corrispondente \( P_{t} \varphi \) P t φ esiste per ogni \( \varphi \) φ limitata e che può essere stimato con un opportuno peso esponenziale. Viene data un’applicazione ad una equazione di Hamilton-Jacobi che interviene in un problema di controllo stocastico.

Stochastic control problem Burgers equation Hamilton-Jacobi equation provider bdim
755001 0537.35003 Bismut, J. M., Large deviations and the Malliavin Calculus. Birkhäuser, 1984. 1047576 0717.49022 10.1016/0022-1236(90)90079-Z Cannarsa, P. - Da Prato, G., Some results on nonlinear optimal control problems and Hamilton-Jacobi equations in infinite dimensions. J. Funct. Anal., 90, 1990, 27-47. Cerrai, S., Optimal control problems for reaction-diffusion equations by a Dynamic Programming approach. Scuola Normale Superiore, Pisa 1998, preprint. 1691934 1111.49302 10.1137/S0363012996311307 Da Prato, G. - Debussche, A., Control of the stochastic Burgers model of turbulence. Siam Journal on Control and Optimization, to appear. 1300149 0824.35112 10.1007/BF01194987 Da Prato, G. - Debussche, A. - Temam, R., Stochastic Burgers equation. NoDEA, 1994, 389-402. 1417491 0849.60052 10.1017/CBO9780511662829 Da Prato, G. - Zabczyk, J., Ergodicity for Infinite Dimensional Systems. London Mathematical Society Lecture Notes, 229, 1996. 1187985 0758.58035 Elworthy, K. D., Stochastic flows on Riemannian manifolds. In: M. A. Pinsky - V. Vihstutz (eds.), Diffusion processes and related problems in analysis. Birkhäuser, 1992, vol. II, 33-72. 454768 0323.49001 Fleming, W. H. - Rishel, R. W., Deterministic and Stochastic Optimal Control. Springer-Verlag, 1975. 1326907 0842.49021 10.1080/03605309508821115 Gozzi, F., Regularity of solutions of a second order Hamilton-Jacobi equation and application to a control problem. Commun. in partial differential equations, 20, 1995, 775-826.
oai:bdim.eu:RLIN_2005_9_16_2_117_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2005_9_16_2_117_0 Periodic solutions of nonlinear wave equations with non-monotone forcing terms Soluzioni periodiche dell'equazione delle onde non lineari con termini forzanti non monotoni Berti Massimiliano Biasco Luca 2005 6 16 RLIN_2005_9_16 9 2 RLIN_2005_9_16_2 117 124 2225505 1225.35147 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Existence and regularity of periodic solutions of nonlinear, completely resonant, forced wave equations is proved for a large class of non-monotone forcing terms. Our approach is based on a variational Lyapunov-Schmidt reduction. The corresponding infinite dimensional bifurcation equation exhibits an intrinsic lack of compactness. This difficulty is overcome finding a-priori estimates for the constrained minimizers of the reduced action functional, through techniques inspired by regularity theory as in [10].

Presentiamo risultati di esistenza ed unicità di soluzioni periodiche per equazioni delle onde nonlineari, completamente risonanti e periodicamente forzate nel tempo, per un'ampia classe di termini forzanti non monotoni. Il nostro approccio si basa su una riduzione variazionale di tipo Lyapunov-Schmidt. La corrispondente equazione di biforcazione manca radicalmente di proprietà di compattezza. Questa difficoltà viene superata trovando opportune stime a-priori per i minimi vincolati del funzionale di azione ridotto, mediante tecniche ispirate alla teoria della regolarità di [10].

Wave equation Periodic solutions Variational methods A-priori estimates Lyapunov-Schmidt reduction provider bdim
2186962 1115.35004 AMBROSETTI, A. - MALCHIODI, A., Perturbation methods and semilinear elliptic problems on $\mathbb{R}^{n}$ R n . To appear. 2245752 1103.35076 10.1016/j.anihpc.2005.05.004 BERTI, M. - BIASCO, L., Forced vibrations of wave equations with non-monotone nonlinearities. Preprint SISSA 2004. 2021909 1072.35015 10.1007/s00220-003-0972-8 BERTI, M. - BOLLE, P., Periodic solutions of nonlinear wave equations with general nonlinearities. Comm. Math. Phys., 243, n. 2, 2003, 315-328. 2038735 1064.35119 10.1016/j.na.2003.11.001 BERTI, M. - BOLLE, P., Multiplicity of periodic solutions of nonlinear wave equations. Nonlinear Anal., 56, 2004, 1011-1046. 470377 0378.35040 10.1002/cpa.3160310102 BRÉZIS, H. - NIRENBERG, L., Forced vibrations for a nonlinear wave equation. Comm. Pure Appl. Math., 31, n. 1, 1978, 1-30. 690201 0489.35061 10.1007/BF01455317 CORON, J.-M., Periodic solutions of a nonlinear wave equation without assumption of monotonicity. Math. Ann., 262, n. 2, 1983, 273-285. 228836 0198.13704 DE SIMON, L. - TORELLI, H., Soluzioni periodiche di equazioni a derivate parziali di tipo iperbolico non lineari. Rend. Sem. Mat. Univ. Padova, 40, 1968, 380-401. 675766 0505.35058 10.1002/mana.19821060128 HOFER, H., On the range of a wave operator with nonmonotone nonlinearity. Math. Nachr., 106, 1982, 327-340. 965608 0675.35058 PLOTNIKOV, P.I. - YUNGERMAN, L.N., Periodic solutions of a weakly nonlinear wave equation with an irrational relation of period to interval length. Translation in Differential Equations, 24 (1988), n. 9, 1989, 1059-1065. 206507 0152.10003 RABINOWITZ, P., Periodic solutions of nonlinear hyperbolic partial differential equations. Comm. Pure Appl. Math., 20, 1967, 145-205. 326179 0219.35062 RABINOWITZ, P., Time periodic solutions of nonlinear wave equations. Manuscripta Math., 5, 1971, 165-194. 624926 0478.49012 10.2307/2043523 WILLEM, M., Density of the range of potential operators. Proc. Amer. Math. Soc., 83, n. 2, 1981, 341-344.
oai:bdim.eu:RLIN_1996_9_7_2_67_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1996_9_7_2_67_0 The growth of solutions of algebraic differential equations Sulla crescita delle soluzioni di equazioni differenziali algebriche Hayman Walter K. 1996 10 7 RLIN_1996_9_7 9 2 RLIN_1996_9_7_2 67 73 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Suppose that \( f(z) \) f z is a meromorphic or entire function satisfying \( P(z, f, f', \ldots , f^{(n)}) = 0 \) P z , f , f , , f n = 0 where \( P \) P is a polynomial in all its arguments. Is there a limitation on the growth of \( f \) f , as measured by its characteristic \( T(r, f) \) T r , f ? In general the answer to this question is not known. Theorems of Gol'dberg, Steinmetz and the author give a positive answer in certain cases. Some illustrative examples are also given.

Sia \( f(z) \) f z una funzione meromorfa o intera dell'equazione \( P(z, f, f', \ldots , f^{(n)}) = 0 \) P z , f , f , , f n = 0 , dove \( P \) P è un polinomio in tutti i suoi termini. Esiste una limitazione della crescita di \( f \) f , considerata rispetto alla sua caratteristica \( T(r, f) \) T r , f ? La risposta a tale questione non è in generale nota. L'autore e i Teoremi Gol'dberg e Steinmetz danno una risposta positiva in alcuni casi. Vengono anche forniti alcuni esempi.

Differential equations Entire Meromorphic Growth provider bdim
320400 0268.34010 BANK, S. B., On determining the growth of meromorphic solutions of algebraic differential equations having arbitrary entire coefficients. Nagoya Math. J., 49, 1973, 53-65. 379940 0296.34005 BANK, S. B., Some results on Analytic and Meromorphic Solutions of Algebraic Differential Equations. Advances in Mathematics, 15, 1975, 41-61. 430371 0337.34007 BANK, S. B., On the existence of meromorphic solutions of differential equations having arbitrarily rapid growth. J. reine angew. Math., 288, 1976, 176-182. 95760 63.0419.02 BASU, N. - BOSE, S. - VIJAYARAGHAVAN, T., A simple example for a Theorem of Vijayaraghavan. J. London Math. Soc., 12, 1937, 250-252. 30.0230.03 BOREL, E., Mémoire sur les séries divergentes. Ann. Sci. École Norm. Sup., 16, 1899, 9-136. 85396 0072.09202 GOL'DBERG, A. A., On single valued solutions of first order differential equations. Ukrain Mat. Zh., 8, 1956, 254-261 (Russian). 385095 0314.30021 HAYMAN, W. K., The local growth of power series: A survey of the Wiman-Valiron method. Canad. Math. Bull., 17 (3), 1974, 317-358. 1207139 0784.30002 10.1515/9783110863147 LAINE, I., Nevanlinna Theory and Complex Differential Equations. Walter de Gruyter, Berlin-New York 1993. 595424 0444.34035 10.1007/BF01299607 STEINMETZ, N., Über das Anwachsen der Lösungen homogener algebraischer Differentialgleichungen zweiter Ordnung. Manuscripta Math., 32, 1980, 303-308. 686638 0565.34005 STEINMETZ, N., Über die eindeutigen Lösungen einer homogenen algebraischer Differentialgleichung zweiter Ordnung. Ann. Acad. Sci. Fenn., AI7, 1982, 177-188. 61658 0055.06702 VALIRON, G., Fonctions Analytiques. Presses Universitaires de France, Paris 1954. 0004.00803 VIJAYARAGHAVAN, T., Sur la croissance des fonctions définies par les équations différentielles. C. R. Acad. Sci., Paris, 194, 1932, 827-829. 77620 0159.10103 WITTICH, H., Neuere Untersuchungen über eindeutige analytische Funktionen. Springer, Berlin-Göttingen-Heidelberg 1955.
oai:bdim.eu:RLIN_2004_9_15_1_29_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2004_9_15_1_29_0 Essential m-dissipativity of Kolmogorov operators corresponding to periodic $2D$ 2 D -Navier Stokes equations Essenziale m-dissipatività dell’operatore di Kolmogorov associato all’equazione di Navier-Stokes stocastica Barbu Viorel Da Prato Giuseppe Debussche Arnaud 2004 3 15 RLIN_2004_9_15 9 1 RLIN_2004_9_15_1 29 38 2102747 1096.35126 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

We prove the essential m-dissipativity of the Kolmogorov operator associated with the stochastic Navier-Stokes flow with periodic boundary conditions in a space $L^{2}(H,\nu)$ L 2 H , ν where $\nu$ ν is an invariant measure

Si dimostra l’essenziale m-dissipatività dell’operatore di Kolmogorov associato al flusso dell’equazione di Navier-Stokes stocastica con condizioni periodiche in uno spazio $L^{2}(H,\nu)$ L 2 H , ν dove $\nu$ ν è una misura invariante.

Stochastic Navier-Stokes equations Kolmogorov operators Invariant measures provider bdim
BARBU, V. - DA PRATO, G., The transition semigroup of stochastic Navier-Stokes equations in $2D$ 2 D . Infinite Dimensional Analysis, Quantum Probability and related topics, to appear. 1930573 1033.76011 10.1007/s00220-002-0708-1 BRICMONT, J. - KUPIAINEN, A. - LEFEVERE, R., Exponential mixing of the $2D$ 2 D stochastic Navier-Stokes dynamics. Commun. Math. Phys., 230, n. 1, 2002, 87-132. 1293091 0817.47048 10.1007/BF02573496 CERRAI, S., A Hille-Yosida theorem for weakly continuous semigroups. Semigroup Forum, 49, 1994, 349-367. 1864036 0996.47028 10.1023/A:1013704610695 DA PRATO, G. - TUBARO, L., Some results about dissipativity of Kolmogorov operators. Czechoslovak Mathematical Journal, 51, 126, 2001, 685-699. 1985790 1012.35001 10.1017/CBO9780511543210 DA PRATO, G. - ZABCZYK, J., Second Order Partial Differential Equations in Hilbert spaces. London Mathematical Society Lecture Notes n. 293, Cambridge University Press, 2002. 1300150 0820.35108 10.1007/BF01194988 FLANDOLI, F., Dissipativity and invariant measures for stochastic Navier-Stokes equations. NoDEA, 1, 1994, 403-423. 1346374 0845.35080 FLANDOLI, F. - MASLOWSKI, B., Ergodicity of the $2D$ 2 D Navier-Stokes equation under random perturbations. Commun. Math. Phys., 171, 1995, 119-141. 1845328 0991.60056 10.1007/s002200100479 KUKSIN, S. - SHIRIKYAN, A., A coupling approach to randomly forced nonlinear PDE’s. I. Commun. Math. Phys., 221, n. 2, 2001, 351-366. 1927233 1010.60066 10.1007/s00220-002-0707-2 KUKSIN, S. - PIATNISKI, A. - SHIRIKYAN, A., A coupling approach to randomly forced nonlinear PDE’s. II. Commun. Math. Phys., 230, n. 1, 2002, 81-85. 0568.35002 TEMAM, R., Navier-Stokes equations. Theory and numerical analysis. North-Holland, 1977. 1868992 0994.60065 10.1007/s002201224083 WEINAN, E. - MATTINGLY, J.C. - SINAI, YA., Gibbsian dynamics and ergodicity for the stochastically forced Navier-Stokes equation. Commun. Math. Phys., 224, n. 1, 2001, 83-106.
oai:bdim.eu:RLIN_1995_9_6_3_133_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1995_9_6_3_133_0 On homogeneizatìon problems for the Laplace operator in partially perforated domains with Neumann's condition on the boundary of cavities. Sul problema della omogeneizzazione per l'operatore di Laplace in domini parzialmente perforati con condizioni di Neumann sul contorno delle cavità Oleinik Olga A. Shaposhnikova Tatiana 1995 10 6 RLIN_1995_9_6 9 3 RLIN_1995_9_6_3 133 142 1363782 0848.35009 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

In this paper the problem of homogeneization for the Laplace operator in partially perforated domains with small cavities and the Neumann boundary conditions on the boundary of cavities is studied. The corresponding spectral problem is also considered.

In questa Nota viene studiato il problema della omogeneizzazione per l'operatore di Laplace in domini parzialmente perforati con piccole cavità e con condizioni di Neumann nel contorno delle cavità. Viene anche considerato il corrispondente problema spettrale.

Homogeneization Perforated domains Small cavities Neumann's condition Spectral problem provider bdim
601059 0289.35002 MARCHENKO, V. A. - KHRUSLOV, E. YA., Boundary Value Problems in Domains with a Fine Grained Boundary. Naukova Dumka, Kiev 1974. 0496.35030 CIORANESCU, D. - MURAT, F., Un terme étranger venu d'ailleurs, 1 & 2. In: H. BREZIS , J.-L. LIONS (eds.), Nonlinear partial differential equations and their application. College de France Seminar, vol. 2-3. Research in Math., 60-70, Pitman, 1982, 98-138, 154-178. 548785 0427.35073 10.1016/0022-247X(79)90211-7 CIORANESCU, D. - SAINT JEAN PAULIN, J., Homogeneization in open sets with holes. J. Math. Anal. Appl., 71, 1979, 590-607. 1195131 0768.73003 OLEINIK, O. A. - YOSIFIAN, G. A. - SHAMAEV, A. S., Mathematical Problems in Elasticity and Homogeneization. North-Holland, Amsterdam 1992. BELIAEV, A. G., Asymptotic of solutions of the Dirichlet problem for the Poisson equation in a perforated domain with small cavities. Russian Math. Survey, vol. 44, n. 4, 1989, 231. 1260777 0923.35022 JÄGER, W. - OLEINIK, O. A. - SHAMAEV, A. S., On homogeneization problem for the Laplace operator in partially perforated domain. Doklady RAS, vol. 333, n. 4, 1993, 424-427. JÄGER, W. - OLEINDC, O. A. - SHAMAEV, A. S., On a homogeneization problem for the Laplace operator in a partially perforated domain with the Neumann condition on holes. Preprint 93-53, Inter-Disziplinäres Zentrum für Wissenschaftliches Rechnen, Heidelberg 1993. 1348290 0854.35010 OLEINIK, O. A. - SHAPOSHNIKOVA, T. A., On an approach of constructing of approximations in homogeneization problems for partially perforated domain. Diff. Equations, vol. 30, n. 11, 1994, 1994-1999. OLEINIK, O. A. - SHAPOSHNIKOVA, T. A., On homogeneization problems in partially perforated domains. Russian Math. Survey, vol. 50, n. 4, 1995.
oai:bdim.eu:RLIN_1995_9_6_3_161_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1995_9_6_3_161_0 «Approximate approximations» and the cubature of potentials «Approssimazione approssimata» e cubatura di potenziali Schmidt Gunther 1995 10 6 RLIN_1995_9_6 9 3 RLIN_1995_9_6_3 161 184 1363785 0845.65008 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

The paper discusses new cubature formulas for classical integral operators of mathematical physics based on the «approximate approximation» of the density with Gaussian and related functions. We derive formulas for the cubature of harmonic, elastic and diffraction potentials approximating with high order in some range relevant for numerical computations. We prove error estimates and provide numerical results for the Newton potential.

—Il lavoro presenta nuove formule di cubatura per classici operatori integrali della fisica matematica basati sull'«approssimazione approssimata» delle relative densità, mediante funzioni Gaussiane o funzioni a queste connesse. Vengono ottenute formule per la cubatura del potenziale armonico, di quello elastico e di quello relativo alla diffrazione. Queste hanno un alto grado di approssimazione in determinati contesti del calcolo numero. Vengono date stime dell'errore e forniti risultati numerici per il potenziale newtoniano.

Multivariate quasi-interpolation Cubature formulas Harmonic, elastic, diffraction potentials provider bdim
ABRAMOWTTZ, M. - STEGUN, I. A., Handbook of Mathematical Functions. Dover, New York 1970. 65685 0058.34103 BATEMAN, H. - ERDÉLYI, A., Tables of Integral Transforms. Vol. II. Mc Graw-Hill, New York 1954. 1269353 0832.41011 BEATSON, R. K. - LIGHT, W. A., Quasi-interpolation in the absence of polynomial reproduction. In: D. BRAESS - L. L. SCHUMAKER (eds.), Numerical Methods of Approximation Theory. Birkhäuser, vol. 9, Basel 1992, 21-39. MAZ'YA, V., A New Approximation Method and its Applications to the Calculation of Volume Potentials. Boundary Point Method. 3. DFG-Kolloquium des DFG-Forschungsschwerpunktes «Randelementmethoden», Schloß Reisensburg, 1991, 18. 1291219 0827.65083 MAZ'YA, V., Approximate approximations. In: J. R. WHITEMAN (éd.), The Mathematics of Finite Elements and Applications. Highlights 1993. Wiley & Sons, Chichester, 77-104. 1429694 0821.65063 10.1007/BF01935022 MAZ'YA, V. - KARLIN, V., Semi-analytic time marching algorithms for semi-linear parabolic equations. BIT, 34, 1994, 129-147. 1120.41013 MAZ'YA, V. - SCHMIDT, G., On Approximate Approximations. Preprint LiTH-MAT-R-94-12, Linköping Univ., Dept. of Math., Linköping 1994. 1367394 0838.65005 10.1093/imanum/16.1.13 MAZ'YA, V. - SCHMIDT, G., On Approximate Approximations using Gaussian Kernels. WIAS Preprint 111, Berlin 1994. 290095 0207.13501 STEIN, E. M., Singular Integrals and Differentiability Properties of Functions. University Press, Princeton 1970. 304972 1026.42001 STEIN, E. M. - WEISS, G., Introduction to Fourier Analysis on Euclidean Spaces. University Press, Princeton 1971.
oai:bdim.eu:RLIN_2002_9_13_2_77_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2002_9_13_2_77_0 Optimal stability and instability results for a class of nearly integrable Hamiltonian systems Risultati ottimali di stabilità e di instabilità per una classe di sistemi Hamiltoniani quasi-integrabili Berti Massimiliano Biasco Luca Bolle Philippe 2002 6 13 RLIN_2002_9_13 9 2 RLIN_2002_9_13_2 77 84 1949480 1072.37060 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

We consider nearly integrable, non-isochronous, a-priori unstable Hamiltonian systems with a (trigonometric polynomial) $O(µ)$ O µ -perturbation which does not preserve the unperturbed tori. We prove the existence of Arnold diffusion with diffusion time $T_{d} = O((1/ \mu) \log(1/ \mu))$ T d = O 1 / μ log 1 / μ by a variational method which does not require the existence of «transition chains of tori» provided by KAM theory. We also prove that our estimate of the diffusion time $T_{d}$ T d is optimal as a consequence of a general stability result proved via classical perturbation theory.

In questa Nota consideriamo sistemi Hamiltoniani quasi-integrabili, non-isocroni, a-priori instabili soggetti ad una perturbazione di ordine $\mu$ μ (un polinomio trigonometrico) che non preserva i tori imperturbati. Facendo uso di tecniche variazionali che NON richiedono l’esistenza di «catene di tori KAM di transizione», dimostriamo l’esistenza di orbite di diffusione con un tempo di diffusione $T_{d} = O((1/ \mu) \log(1/ \mu))$ T d = O 1 / μ log 1 / μ . Proviamo inoltre che la nostra stima sul tempo di diffusione è ottimale, a seguito di un risultato generale di stabilità per le variabili di azione dimostrato mediante la teoria classica delle perturbazioni.

Arnold diffusion Variational methods Shadowing theorem Perturbation theory Non-linear functional analysis provider bdim
1614571 1004.37043 10.1016/S0294-1449(97)89300-6 Ambrosetti, A. - Badiale, M., Homoclinics: Poincaré-Melnikov type results via a variational approach. Ann. Inst. Henri Poincaré - Analyse Non Lineaire, v. 15, n. 2, 1998, 233-252. 0135.42602 Arnold, V.I., Instability of dynamical systems with several degrees of freedom. Sov. Math. Dokl., 6, 1964, 581-585. 1837581 1009.37044 Berti, M. - Bolle, P., Diffusion time and splitting of separatrices for nearly integrable isochronous Hamiltonian systems. Rend. Mat. Acc. Lincei, s. 9, v. 11, 2000, 235-243. 1087.37048 Berti, M. - Bolle, P., A functional analysis approach to Arnold’s diffusion. Ann. Inst. Henri Poincaré, Analyse Non Lineaire, to appear. 1897882 1023.37033 10.3934/dcds.2002.8.795 Berti, M. - Bolle, P., Fast Arnold’s diffusion in systems with three time scales. Discrete and Continuous Dynamical Systems, series A, v. 8, n. 3, july 2002, 795-811. 1996776 1025.37037 10.1016/S0021-7824(03)00032-1 Berti, M. - Biasco, L. - Bolle, P., Drift in phase space: a new variational mechanism with optimal diffusion time. SISSA 2002, preprint. 1375654 0867.70013 10.1016/0362-546X(94)00270-R Bessi, U., An approach to Arnold diffusion through the calculus of variations. Nonlinear Analysis T. M. A., 26, 1996, 1115-1135. 1810511 0986.37052 10.1016/S0021-7824(00)01188-0 Bessi, U. - Chierchia, L. - Valdinoci, E., Upper Bounds on Arnold Diffusion Time via Mather theory. J. Math. Pures Appl., v. 80, 1, 2001, 105-129. 1952372 1032.37039 Biasco, L. - Chierchia, L., On the stability of some properly-degenerate Hamiltonian systems. Discrete and Continuous Dynamical Systems, series A, to appear. 1600299 0910.60082 10.1007/s002200050249 Bourgain, J. - Golse, F. - Wennberg, B., On the distribution of free path lengths for periodic Lorentz gas. Comm. Math. Phys., v. 190, 1998, 491-508. 1259103 1010.37039 Chierchia, L. - Gallavotti, G., Drift and diffusion in phase space. Ann. Inst. Henri Poincaré, section Physique Théorique, 60, 1994, 1-144; see also Erratum in v. 68, 1998, 135. 1849660 1018.37040 10.3934/dcds.2001.7.787 Cresson, J., The transfer lemma for Graff tori and Arnold diffusion time. Discrete and Continuous Dynamical Systems, v. 7, n. 4, 2001, 787-800. 1952386 1031.37054 Cresson, J. - Guillet, C., Periodic orbits and Arnold diffusion. Discrete and Continuous Dynamical Systems, to appear. 1386217 0854.70011 Marco, J.P., Transitions le long des chaȋnes de tores invariants pour les systèmes hamiltoniens analytiques. Ann. Inst. Henri Poincaré, v. 64, 1995, 205-252. 501140 0389.70028 Nekhoroshev, N.N., An exponential estimate of the time of stability of nearly-integrable Hamiltonian systems. Russian Mathematical Survey, 32, 1977. 1221713 0857.70009 10.1007/BF03025718 Pöschel, J., Nekhoroshev estimates for quasi-convex Hamiltonian Systems. Math. Zeitschrift, 213, 1993, 187-216.
oai:bdim.eu:RLIN_1994_9_5_4_283_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1994_9_5_4_283_0 The Hughes subgroup Il sottogruppo di Hughes Bryce Robert 1994 12 5 RLIN_1994_9_5 9 4 RLIN_1994_9_5_4 283 288 1320579 0832.20034 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Let \( G \) G be a group and \( p \) p a prime. The subgroup generated by the elements of order different from \( p \) p is called the Hughes subgroup for exponent \( p \) p . Hughes [3] made the following conjecture: if \( H_{p}(G) \) H p G is non-trivial, its index in \( G \) G is at most \( p \) p . There are many articles that treat this problem. In the present Note we examine those of Strauss and Szekeres [9], which treats the case \( p = 3 \) p = 3 and \( G \) G arbitrary, and that of Hogan and Kappe [2] concerning the case when \( G \) G is metabelian, and \( p \) p arbitrary. A common proof is given for the two cases and a possible lacuna in the first is filled.

Sia \( G \) G un gruppo e \( p \) p un numero primo; si dice sottogruppo di Hughes relativo a \( p \) p il sottogruppo \( H_{p}(G) \) H p G generato dagli elementi di \( G \) G di ordine diverso da \( p \) p . Hughes[3] fece la seguente congettura: se \( H_{p}(G) \) H p G non è banale, il suo indice in \( G \) G è \( \le p \) p . Vi sono molti lavori relativi a questo problema. Nella presente Nota vengono presi in esame quello di Strauss e Szekeres [9] relativo al caso \( p = 3 \) p = 3 , \( G \) G qualunque, e quello di Hogan e Kappe [2] concernente il caso \( G \) G metabeliano, \( p \) p qualunque. Si dà un procedimento unico per i due casi e si colma una possibile lacuna del primo lavoro.

Infinite groups Hughes subgroup Metabelian groups provider bdim
105441 0084.25602 HALL, P., Some sufficient conditions for a group to be nilpotent. Illinois J. Math., 2, 1958, 787-801. 238952 0197.02101 HOGAN, G. T. - KAPPE, W. P., On the \( H_{p} \) H p -problem for finite \( p \) p -groups. Proc. Amer. Math. Soc., 20, 1969, 450-454. HUGHES, D. R., Research Problem No. 3. Bull. Amer. Math. Soc., 63, 1957, 209. 108532 0098.25201 HUGHES, D. R. - THOMPSON, J. G., The \( H_{p} \) H p -problem and the structure of \( H_{p} \) H p -groups. Pac. J. Math., 9, 1959, 1097-1101. 0501.20016 KHUKHRO, E. J., On a connection between Hughes' conjecture and relations in finite groups of prime exponent. Math. USSR Sbornik, 44, 1983, 227-237. 985841 0658.20015 KHUKHRO, E. J., On Hughes problem for finite \( p \) p -groups. Algebra and Logic, 26, 1987, 136-145. 7417 0061.02606 LEVI, F. W., Groups in which the commutator relation satisfies certain algebraic conditions. J. Indian Math. Soc., New Ser., 6, 1942, 87-97. 271230 0211.04402 MACDONALD, I. D., Solution of the Hughes problem for finite \( p \) p -groups of class \( 2p-2 \) 2 p - 2 . Proc. Amer. Math. Soc., 27, 1971, 39-42. 93549 0081.25605 STRAUSS, E. - SZEKERES, G., On a problem of D. R. Hughes. Proc. Amer. Math. Soc., 9, 1958, 157-158. 219607 0189.31701 WALL, G. E., On Hughes' \( H_{p} \) H p problem. Proceedings of the International Conference on Theory of Groups. Austral. Nat. Univ. Canberra, August 1965, 357-362. Gordon and Breach Science Publishers, Inc. 1967. 137761 0105.02302 ZAPPA, G., Contributo allo studio del problema di Hughes sui gruppi. Ann. Mat. Pura Appl., (4), 57, 1962, 211-219.
oai:bdim.eu:RLIN_1993_9_4_2_131_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1993_9_4_2_131_0 A footnote to a paper by Noma Un'osservazione su un lavoro di Noma Lanteri Antonio Russo Francesco 1993 6 4 RLIN_1993_9_4 9 2 RLIN_1993_9_4_2 131 132 1277004 0784.14015 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Let \( E \) E be a globally generated ample vector bundle of rank \( \ge 2 \) 2 on a complex projective smooth surface \( X \) X . By extending a recent result by A. Noma, we classify pairs \( (X, E) \) X , E as above satisfying \( c_{2}(E) = 2 \) c 2 E = 2 .

Sia \( E \) E un fibrato vettoriale ampio e globalmente generato di rango \( \ge 2 \) 2 su una superficie algebrica proiettiva complessa non singolare \( X \) X . Una semplice osservazione consente di estendere un recentissimo risultato di A. Noma, classificando le coppie \( (X, E) \) X , E come sopra nell'ipotesi che \( E \) E abbia seconda classe di Chern \( c_{2}(E) = 2 \) c 2 E = 2 .

Algebraic surfaces (complex, projective) Vector bundles (ample) Classification provider bdim
1106503 0693.14006 10.1007/BF01246777 BALLICO, E. - LANTERI, A., Ample and spanned rank-2 vector bundles with \( c_{2} = 2 \) c 2 = 2 on complex surfaces. Arch. Math., 56, 1991, 611-615. 1047397 0733.14018 BIANCOFIORE, A. - FANIA, M. L. - LANTERI, A., Polarized surfaces with hyperelliptic sections. Pac. J. Math., 143, 1990, 9-24. 1125009 0723.14008 10.1007/BF01445192 BIANCOFIORE, A. - LANTERI, A. - LIVORNI, E. L., Ample and spanned vector bundles of sectional genera three. Math. Ann., 291, 1991, 87-101. 1181186 0802.14006 10.2307/2154657 NOMA, A., Classification of rank-2 ample and spanned vector bundles on surfaces whose zero loci consist of general points. Trans. Amer. Math. Soc., to appear. 561910 0438.32016 OKONEK, CH. - SCHNEIDER, M. - SPINDLER, H., Vector bundles on Complex Projective Spaces. Progress in Math., 3, Birkhäuser, Basel-Boston 1980.
oai:bdim.eu:RLIN_2002_9_13_3-4_271_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2002_9_13_3-4_271_0 Poisson-like kernels in tube domains over light-cones Garrigós Gustavo 2002 12 13 RLIN_2002_9_13 9 3-4 RLIN_2002_9_13_3-4 271 283 1984106 1225.32005 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

A family of holomorphic function spaces can be defined with reproducing kernels $B_{\alpha}(z,w)$ B α z , w , obtained as real powers of the Cauchy-Szegö kernel. In this paper we study properties of the associated Poisson-like kernels: $P_{\alpha}(z,w) = |B_{\alpha}(z,w)|^{2} / B_{\alpha}(z,z)$ P α z , w = B α z , w 2 / B α z , z . In particular, we show boundedness of associated maximal operators, and obtain formulas for the limit of Poisson integrals in the topological boundary of the cone.

Tube domain Poisson kernel Maximal function Bergman space provider bdim
1311766 0863.47018 Békollé, D. - Bonami, A., Estimates for the Bergman and Szegö projections in two symmetric domains of $\mathbb{C}^{n}$ C n . Colloq. Math., 68, 1995, 81-100. Békollé, D. - Bonami, A. - Garrigós, G. - Ricci, F., Littlewood-Paley decompositions and Besov spaces related to symmetric cones. Univ. Orléans, preprint 2001. 1836772 0983.32001 10.1007/PL00004861 Békollé, D. - Bonami, A. - Peloso, M. - Ricci, F., Boundedness of weighted Bergman projections on tube domains over light cones. Math. Z., 237, 2001, 31-59. 1984099 1225.32012 Bonami, A., Three related problems on Bergman spaces of tube domains over symmetric cones. Rend. Mat. Acc. Lincei, s. 9, v. 13, 2002, 183-197. 1446489 0841.43002 Faraut, J. - Korányi, A., Analysis on symmetric cones. Clarendon Press, Oxford 1994. 296602 0234.42009 Fefferman, C., The multiplier problem for the ball. Ann. of Math., 94, 1971, 330-336. 1876845 0999.42014 10.4064/cm90-2-4 Garrigós, G., Generalized Hardy spaces in tube domains over cones. Colloq. Math., 90 (2), 2001, 213-251. 166596 0115.33101 Gelfand, I. - Shilov, G., Generalized functions I. Academic Press, New York 1964. 445019 0398.32018 Rossi, H. - Vergne, M., Équations de Cauchy-Riemann tangentielles associées a un domaine de Siegel. Ann. scient. Éc. Norm. Sup., 9, 1976, 31-80. 578903 0252.43022 Stein, E., Some problems in harmonic analysis suggested by symmetric spaces and semi-simple Lie groups. Actes, Congrès intern. math. 1, 1970, 173-189. 1232192 0821.42001 Stein, E., Harmonic Analysis. Princeton University Press, 1993. 304972 0232.42007 Stein, E. - Weiss, G., Fourier Analysis on Euclidean Spaces. Princeton University Press, 1971. 179386 0126.09405 Stein, E. - Weiss, G. - Weiss, M., $H^{p}$ H p classes of holomorphic functions in tube domains. Proc. Nat. Acad. Sci. USA, 52, 1964, 1035-1039. 480883 0356.32020 Vergne, M. - Rossi, H., Analytic continuation of the holomorphic discrete series of a semi-simple Lie group. Acta Math., 136, 1976, 1-59.
oai:bdim.eu:RLIN_1993_9_4_4_279_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1993_9_4_4_279_0 The role of deviatone and volumetrie non-associativities on strain localization Il ruolo della non associatività deviatorica e volumetrica nella localizzazione delle deformazioni Benallal Ahmed Comi Claudia 1993 12 4 RLIN_1993_9_4 9 4 RLIN_1993_9_4_4 279 290 1269618 0798.73009 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

A homogeneous solid subject to quasi-static loading in the small strain range is considered. The material model assumed is rate-independent, non-associative and incrementally bilinear. The strain localization conditions are analytically solved using a geometric method. The expressions of the critical hardening moduli, their domains of validity and the form of the strain rate discontinuity are obtained. Finally these results, and in particular the role of hydrostatic and deviatoric non-normality, are discussed with reference to an elastic-plastic model for rock-like materials.

Si considera un solido omogeneo soggetto ad azioni variabili staticamente, in regime di piccole deformazioni; si assume che il comportamento del materiale sia descritto da una legge incrementalmente bilineare, genericamente non associata. Le condizioni di localizzazione delle deformazioni vengono risolte analiticamente facendo uso di un metodo geometrico. Si ottengono le espressioni dei moduli di incrudimento critici, i loro domini di validità e la forma della discontinuità delle velocità di deformazione. Tali risultati ed in particolare il ruolo della non associatività sia volumetrica che deviatorica sono poi discussi con riferimento ad un modello elastoplastico per materiali lapidei.

Localization Strain discontinuity Non-associative plasticity provider bdim
RUDNICKI, J. W. - RICE, J. R., Conditions for the localization of deformation in pressure-sensitive dilatant materials. J. Mech. Phys. Solids, vol. 23, 1975, 371-394. 574491 0433.73032 RICE, J. R. - RUDNICKI, J. W., A note on some features of the theory of localization of deformation. Int. J. Solids Structures, vol. 16, 1980, 597-605. 1013513 0673.73023 10.1007/BF01576001 BORRE, G. - MAIER, G., On linear vs. non-linear flow rules in strain localization analysis. Meccanica, vol. 24, 1989, 36-41. 0803.73032 PERRIN, G. - LEBLOND, J. B., Rudnicki and Rice's analysis of strain localization rivisited. J. Appl. Mech., to appear. OTTOSEN, N. S. - RUNESSON, K., Discontinuous bifurcations in a non-associated Mohrmaterial. Mech. of Materials, vol. 12, 1991, 255-265. 1111553 0749.73017 10.1016/0020-7683(91)90205-T BIGONI, D. - HEUCKEL, T., Uniqueness and localization - I. Associative and non-associative elastoplasticity. Int. J. Solids Structures, vol. 28, 1991, 197-213. 0757.73001 BENALLAL, A., On localization phenomena in thermo-elasto-plasticity. Arch. Mech., vol. 44, 1992, 15-29. BENALLAL, A. - COMI, C., Explicit solutions to localization conditions via a geometrical method. The coaxial case. Rapport interne, LMT Cachan, février 1993. 0666.73010 CHEN, W. F. - HAN, D. J., Plasticity for structural engineers. Springer-Verlag, 1987.
oai:bdim.eu:RLIN_2002_9_13_3-4_199_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2002_9_13_3-4_199_0 Hua-harmonic functions on symmetric type two Siegel domains Buraczewski Dariusz Damek Ewa 2002 12 13 RLIN_2002_9_13 9 3-4 RLIN_2002_9_13_3-4 199 207 1984100 1225.32004 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

We study a natural system of second order differential operators on a symmetric Siegel domain $\mathcal{D}$ D that is invariant under the action of biholomorphic transformations. If $\mathcal{D}$ D is of type two, the space of real valued solutions coincides with pluriharmonic functions. We show the main idea of the proof and give a survey of previous results.

Symmetric Siegel domain Pluriharmonic function Invariant system of differential opera- tors provider bdim
644825 0521.32024 Berline, N. - Vergne, M., Equations de Hua et noyau de Poisson. Lecture Notes in Mathematics, vol. 880, Springer-Verlag, 1981, 1-51. 1878631 0999.31005 10.1006/jfan.2001.3823 Bonami, A. - Buraczewski, D. - Damek, E. - Hulanicki, A. - Penney, R. - Trojan, B., Hua system and pluriharmonicity for symmetric irreducible Siegel domains of type II. Journal of Functional Analysis, 188, n. 1, 2002, 38-74. Buraczewski, D., Pluriharmonicity of Hua harmonic functions on symmetric irreducible Siegel domains of type II. Preprint. 1906712 1008.32013 10.1007/s002090100367 Buraczewski, D. - Damek, E. - Hulanicki, A., Bounded plurihramonic functions on symmetric irreducible Siegel domains. Mathematische Zeitschrift, to appear. 1762449 0999.32012 Damek, E. - Hulanicki, A., Pluriharmonic functions on symmetric irreducible Siegel domains. Studia Math., 139, n. 2, 2000, 104-140. 1792830 0969.31007 10.1007/PL00001648 Damek, E. - Hulanicki, A. - Müller, D. - Peloso, M., Pluriharmonic $H^{2}$ H 2 functions on symmetric irreducible Siegel domains. Geom. and Funct. Analysis, 10, 2000, 1090-1117. 0199.20102 Harish-Chandra, , Discrete series for semisimple Lie groups II. Acta Math., 116, 1960, 1-111. 1280714 1157.43003 Helgason, S., Geometric Analysis on Symmetric Spaces. Amer. Math. Soc., Providence 1994. 171936 0112.07402 Hua, L.K., Harmonic Analysis of Functions of Several Complex Variables in Classical Domains. Translations of Math. Monographs, vol. 6, Amer. Math. Soc., Providence 1963. 476918 0395.22012 Johnson, K., Remarks on the theorem of Korányi and Malliavin on the Siegel upper half-plane of rank two. Proc. Amer. Math. Soc., 67, 1977, 351-356. 499140 0395.22013 10.1007/BF02385985 Johnson, K., Differential equations and the Bergman-Shilov boundary on the Siegel upper half-plane. Arkiv for Matematik, 16, 1978, 95-108. 577139 0468.32007 10.2307/1971111 Johnson, K.D. - Korányi, A., The Hua operators on bounded symmetric domains of tube type. Ann. of Math., (2) 111, n. 3, 1980, 589-608. 410278 0318.60066 Korányi, A. - Malliavin, P., Poisson formula and compound diffusion associated to an overdetermined elliptic system on the Siegel halfplane of rank two. Acta Math., 134, 1975, 185-209. 751135 0582.32042 10.1007/BF01389139 Lassalle, M., Les équations de Hua d’un domaine borné symétrique du type tube. Invent. Math., 77, 1984, 129-161. 0142.05002 Pjatecki-Shapiro, I.I., Geometry and classification of homogeneous bounded domains in $C$ C . Uspehi Math. Nauk, 2, 1965, 3-51; Russian Math. Surv., 20, 1966, 1-48.
oai:bdim.eu:RLIN_1997_9_8_4_251_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1997_9_8_4_251_0 Heteroclinic solutions for perturbed second order systems Soluzioni eterocline per sistemi perturbati del secondo ordine Berti Massimiliano 1997 12 8 RLIN_1997_9_8 9 4 RLIN_1997_9_8_4 251 262 1631609 0931.37018 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

The existence of infinitely many heteroclinic orbits implying a chaotic dynamics is proved for a class of perturbed second order Lagrangian systems possessing at least 2 hyperbolic equilibria.

Viene dimostrata l'esistenza di infinite orbite eterocline per una classe di sistemi lagrangiani del secondo ordine, perturbati, aventi almeno 2 equilibri iperbolici. La dinamica è caotica.

Heteroclinic orbits Homoclinic orbits Chaotic dynamics provider bdim
1416171 0887.34042 10.1016/S0294-1449(97)89300-6 AMBROSETTI, A. - BADIALE, M., Homoclinics: Poincaré-Melnikov type results via a variational approach. C. R. Acad. Sci. Paris, t. 323, Série I, 1996, 753-758; and Annales I.H.P., to appear. 1746547 0957.37019 10.1007/BF02506001 BERTI, M. - BOLLE, P., Homoclinics and Chaotic Behaviour for Perturbed Second Order Systems. Preprint S.N.S. n. 3. 156048 0135.31001 MELNIKOV, V. K., On the stability of the center for time periodic perturbations. Trans. Moscow Math. Soc., 12, 1963, 3-52. 30.0834.08 POINCARÉ, H., Les méthodes nouvelles de la mécanique céleste. Gauthiers-Villars, Paris 1889. 1143210 0725.58017 10.1007/BF02570817 SÉRÉ, E., Existence of infinitely many homoclinic orbits in Hamiltonian systems. Math. Zeitschrift, 209, 1992, 27-42. 1249107 0803.58013 SÉRÉ, E., Looking for the Bernoulli shift. Ann. Inst. H. Poincaré, Anal. Nonlin., 10, 1993, 561- 590.
oai:bdim.eu:RLIN_1995_9_6_4_237_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1995_9_6_4_237_0 Regularity properties of solutions of elliptic equations in \( \mathbb{R}^{2} \) R 2 in limit cases Proprietà di regolarità per soluzioni di equazioni ellittiche in \( \mathbb{R}^{2} \) R 2 in casi limite Alberico Angela Ferone Vincenzo 1995 12 6 RLIN_1995_9_6 9 4 RLIN_1995_9_6_4 237 250 1382708 0860.35015 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

In this paper the Dirichlet problem for a linear elliptic equation in an open, bounded subset of \( \mathbb{R}^{2} \) R 2 is studied. Regularity properties of the solutions are proved, when the data are \( L^{1} \) L 1 -functions or Radon measures. In particular sharp assumptions which guarantee the continuity of solutions are given.

In questa Nota si studia il problema di Dirichlet per un'equazione lineare ellittica in un insieme aperto, limitato di \( \mathbb{R}^{2} \) R 2 . Sono provate proprietà di regolarità per le soluzioni, quando i dati sono funzioni di \( L^{1} \) L 1 oppure misure di Radon. In particolare sono date ipotesi ottimali che garantiscono la continuità delle soluzioni.

Elliptic equations Lorentz spaces Continuity properties provider bdim
960950 0672.31008 10.2307/1971445 ADAMS, D. R., A sharp inequality of J. Moser for higher order derivatives. Annals of Math., 128, 1988, 385-398. 0412.46024 ALVINO, A., Un caso limite della disuguaglianza di Sobolev in spazi di Lorentz. Rend. Acc. Sci. Fis. Mat. Napoli, 44, 1977, 105-112. 0371.35009 ALVINO, A., Formule di maggiorazione e regolarizzazione per soluzioni di equazioni ellittiche del secondo ordine in un caso limite. Atti Acc. Lincei Rend, fis., s. 8, vol. 52, 1977, 335-340. 1389498 0856.46020 10.1007/BF00282364 ALVINO, A. - FERONE, V. - TROMBETTI, G., Moser-type inequalities in Lorentz spaces. Potential Anal., to appear. 576995 0456.46028 BENNETT, C. - RUDNICK, K., On Lorentz-Zygmund spaces. Dissert. Math., 175, 1980, 1-67. 0707.35060 BOCCARDO, L. - GALLOUËT, T., Non-linear elliptic and parabolic equations involving measures data. Journal of Functional Analysis, 87, 1989, 149-169. 1290666 0807.35034 10.1007/BF01468245 BOCCARDO, L. - MURAT, F., A property of nonlinear elliptic equations when the right-hand side is a measure. Potential Anal., 3, 1994, 257-263. 1132783 0746.35006 10.1080/03605309108820797 BREZIS, H. - MERLE, F., Uniform estimates and blow-up behavior for solutions of \( — \Delta u = V(x) e^{u} \) Δ u = V x e u in two dimensions. Comm. in P.D.E., 16, 1991, 1223-1253. 336050 0278.35041 BREZIS, H. - STRAUSS, W. A., Semi-linear second-order elliptic equations in \( L^{1} \) L 1 . J. Math. Soc. Japan, 25, 1973, 565-590. 1190215 0797.35031 10.1007/BF02567065 CHANILLO, S. - LI, Y. Y., Continuity of solutions of uniformly elliptic equations in \( \mathbb{R}^{2} \) R 2 . Manuscripta Math., 77, 1992, 415-433. 536688 0424.46023 10.1080/00036817908839248 CHITI, G., Rearrangements of functions and convergence in Orlicz spaces. Appl. Anal., 9, 1979, 23-27. 372140 0275.46024 CHONG, K. M. - RICE, N. M., Equimeasurable rearrangements of functions. Queen's papers in pure and applied mathematics, no. 28, Queen's University, Ontario, 1971. 1278335 0799.35056 FERONE, V., Estimates and regularity for solutions of elliptic equations in a limit case. Boll. U.M.I., (7) 8B, 1994, 257-270. 1402586 0865.49008 10.1006/jmaa.1996.0301 FERONE, V. - FUSCO, N., Continuity properties of minimizers of integral functionals. J. Math. Anal. Appl., to appear. 1251616 0797.35019 LISKEVICH, V. A., Some limit cases in estimates for solutions of second order elliptic equations. Houston J. Math., 19, 1993, 661-673. 170094 0142.37601 SERRIN, J., Pathological solutions of elliptic differential equations. Ann. Scuola Norm. Sup. Pisa, (3) 18, 1964, 385-387. 192177 0151.15401 STAMPACCHIA, G., Le problème de Dirichlet pour les équations elliptiques du second ordre à coefficients discontinus. Ann. Inst. Fourier, Grenoble, 15, 1965, 189-258. 601601 0341.35031 TALENTI, G., Elliptic equations and rearrangements. Ann. Scuola Norm. Sup. Pisa, (4) 3, 1976, 697-718.
oai:bdim.eu:RLIN_1993_9_4_2_87_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1993_9_4_2_87_0 Teoria degli operatori intermedi e applicazioni: statica elastica con coefficienti discontinui, il problema misto e i problemi di trasmissione Theory and applications of intermediate operators: elastostatics with discontinuous coefficients, the mixed problem and the transmission problems Lanzara Flavia 1993 6 4 RLIN_1993_9_4 9 2 RLIN_1993_9_4_2 87 98 1233395 0785.73017 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Viene applicata la teoria della Nota I al problema al contorno dell'elastostatica quando sul contorno vengono prescritte condizioni miste. I coefficienti elastici sono supposti solo limitati e misurabili. Viene fatta un'analisi dettagliata per determinare l'operatore base. Si fa inoltre vedere come i problemi di trasmissione, relativi a due o più solidi elastici non isotropi e non omogenei incastrati l'uno nell'altro, rientrano nella teoria sviluppata nelle Note precedenti.

The theory of Note I is applied to the boundary value problem of Elastostatics when mixed conditions are given on the boundary. The elastic coefficients are only supposed to be bounded and measurable. A detailed analysis is carried out for determining the base operator. It is shown how to apply the theory developed in the previous Notes to the transmission problems for an elastic body which is formed by two or more different anisotropic and heterogeneous elastic bodies, one being clamped onto the other.

Elastostatics with discontinuous coefficients Green's operator Green's matrix provider bdim
89978 0075.10103 LIONS, J. J., Contribution à un problême de Picone. Annali di Matematica Pura e Applicata, s. IV, v. XLI, 1956, 201-219. 94579 0097.30601 CAMPANATO, S., Sul problema di Picone relativo all'equilibrio di un corpo elastico incastrato. Ricerche Matematiche, v. VI, f. I, 1957, 125-149. 388927 0283.35016 FICHERA, G., Analytic Problems Concerning Heterogeneous Elastic Media. Proceedings of Symposium on Continuum Mechanics and Related Problems of Analysis, v. 1, Tbilisi 1973, 315-324.
oai:bdim.eu:RLIN_1998_9_9_3_157_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1998_9_9_3_157_0 On the existence of infinitely many solutions for a class of semilinear elliptic equations in \( \mathbb{R}^{N} \) R N Sull’esistenza di infinite soluzioni per una classe di equazioni ellittiche semilineari su \( \mathbb{R}^{N} \) R N Alessio Francesca Caldiroli Paolo Montecchiari Piero 1998 9 9 RLIN_1998_9_9 9 3 RLIN_1998_9_9_3 157 165 1683006 0923.35057 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

We show, by variational methods, that there exists a set \( \mathcal{A} \) A open and dense in \( {a \in L^{\infty} ( \mathbb{R}^{N}) : a \ge 0} \) a L R N : a 0 such that if \( a \in \mathcal{A} \) a A then the problem \( - \triangle u + u = a(x) |u|^{p-1} u, u \in H^{1}(\mathcal{R}^{N}) \) - u + u = a x u p - 1 u , u H 1 R N , with \( p \) p subcritical (or more general nonlinearities), admits infinitely many solutions.

Usando metodi variazionali, si dimostra che esiste un insieme \( \mathcal{A} \) A aperto e denso in \( {a \in L^{\infty} ( \mathbb{R}^{N}) : a \ge 0} \) a L R N : a 0 tale che per ogni \( a \in \mathcal{A} \) a A il problema \( - \triangle u + u = a(x) |u|^{p-1} u, u \in H^{1}(\mathcal{R}^{N}) \) - u + u = a x u p - 1 u , u H 1 R N , con \( p \) p sottocritico (o con nonlinearità più generali), ammette infinite soluzioni.

Semilinear elliptic equations Locally compact case Minimax arguments Multiplicity of solutions Genericity provider bdim
1153310 0766.35009 10.1016/0022-0396(92)90145-D Alama, S. - Li, Y. Y., Existence of solutions for semilinear elliptic equations with indefinite linear part. J. Diff. Eq., 96, 1992, 88-115. 1831991 0931.35047 Alessio, F. - Caldiroli, P. - Montecchiari, P., Genericity of the existence of infinitely many solutions for a class of semilinear elliptic equations in \( \mathbb{R}^{n} \) R n . Ann. Scuola Norm. Sup. Pisa, Cl. Sci., (4), to appear. 1416171 0887.34042 10.1016/S0294-1449(97)89300-6 Ambrosetti, A. - Badiale, M., Homoclinics: Poincaré-Melnikov type results via a variational approach. C.R. Acad. Sci. Paris, 323, s. I, 1996, 753-758; Ann. Inst. H. Poincaré, Anal. non linéaire, to appear. 1486895 0896.35042 10.1007/s002050050067 Ambrosetti, A. - Badiale, M. - Cingolani, S., Semiclassical states of nonlinear Schrödinger equation. Arch. Rat. Mech. Anal., 140, 1997, 285-300. 921893 0653.35030 Angenent, S., The Shadowing Lemma for Elliptic PDE. In: S. N. Chow - J. K. Hale (eds.), Dynamics of Infinite Dimensional Systems. NATO ASI Series, F37, Springer-Verlag, 1987. 1086148 0731.35036 10.4171/RMI/92 Bahri, A. - Li, Y. Y., On a Min-Max Procedure for the Existence of a Positive Solution for Certain Scalar Field Equation in \( \mathbb{R}^{n} \) R n . Rev. Mat. Iberoamericana, 6, 1990, 1-15. 1450954 0883.35045 10.1016/S0294-1449(97)80142-4 Bahri, A. - Lions, P. L., On the existence of a positive solution of semilinear elliptic equations in unbounded domains. Ann. Inst. H. Poincaré, Anal. non linéaire, 14, 1997, 365-413. 695535 0533.35029 10.1007/BF00250555 Berestycki, H. - Lions, P. L., Nonlinear scalar field equations. Arch. Rat. Mech. Anal., 82, 1983, 313-345. 1082280 0729.35049 10.1016/0362-546X(90)90152-7 Cao, D. M., Positive solutions and bifurcation from the essential spectrum of a semilinear elliptic equation in \( \mathbb{R}^{n} \) R n . Nonlinear Anal. T.M.A., 15, 1990, 1045-1052. 1253603 0797.35039 Cao, D. M., Multiple solutions of a semilinear elliptic equation in \( \mathbb{R}^{n} \) R n . Ann. Inst. H. Poincaré, Anal. non linéaire, 10, 1993, 593-604. 1409663 0859.35032 Cao, D. M. - Noussair, E. S., Multiplicity of positive and nodal solutions for nonlinear elliptic problems in \( \mathbb{R}^{n} \) R n . Ann. Inst. H. Poincaré, Anal. non linéaire, 13, 1996, 567-588. 1669769 0922.35051 Cingolani, S., On a perturbed semilinear elliptic equation in \( \mathbb{R}^{n} \) R n . Comm. Appl. Anal., to appear. 1181725 0785.35029 10.1002/cpa.3160451002 Coti Zelati, V. - Rabinowitz, P. H., Homoclinic type solutions for a semilinear elliptic PDE on \( \mathbb{R}^{n} \) R n . Comm. Pure Appl. Math., 45, 1992, 1217-1269. 0901.35023 Del Pino, M. - Felmer, P. L., Multi-peak bound states for nonlinear Schrödinger equations. Ann. Inst. H. Poincaré, Anal. non linéaire, to appear. 807816 0616.35029 10.1007/BF00282336 Ding, W. Y. - Ni, W. M., On the existence of a positive entire solution of a semilinear elliptic equation. Arch. Rat. Mech. Anal., 91, 1986, 283-308. 688279 0506.35035 10.1017/S0308210500031607 Esteban, M. J. - Lions, P. L., Existence and nonexistence results for semilinear elliptic problems in unbounded domains. Proc. Roy. Soc. Edinburgh, 93, 1982, 1-14. 1391524 0857.35116 10.1080/03605309608821208 Gui, C., Existence of multi-bump solutions for nonlinear Schrödinger equations via variational methods. Comm. in PDE, 21, 1996, 787-820. 949624 0662.35038 10.1016/0022-0396(88)90017-4 Li, Y., Remarks on a semilinear elliptic equations on \( \mathbb{R}^{n} \) R n . J. Diff. Eq., 74, 1988, 34-39. 1245597 0790.53040 10.1006/jfan.1993.1138 Li, Y. Y., Prescribing scalar curvature on \( S^{3} \) S 3 , \( S^{4} \) S 4 and related problems. J. Funct. Anal., 118, 1991, 43-118. 1606351 1023.35500 Li, Y. Y., On a singularly perturbed elliptic equation. Adv. Diff. Eq., 2, 1997, 955-980. 0704.49004 Lions, P. L., The concentration-compactness principle in the calculus of variations: the locally compact case. Part I, II. Ann. Inst. H. Poincaré, Anal. non linéaire, 1, 1984, 109-145; 223-283. 1405365 0866.35043 Montecchiari, P., Multiplicity results for a class of Semilinear Elliptic Equations on \( \mathbb{R}^{m} \) R m . Rend. Sem. Mat. Univ. Padova, 95, 1996, 217-252. 1422010 0909.35042 Musina, R., Multiple positive solutions of the equation \( - \triangle u - \lambda u + k (x) u^{p-1} = 0 \) - u - λ u + k x u p - 1 = 0 in \( \mathbb{R}^{n} \) R n . Top. Meth. Nonlinear Anal., 7, 1996, 171-185. 1205391 0836.35045 Rabinowitz, P. H., A note on a semilinear elliptic equation on \( \mathbb{R}^{n} \) R n . In: A. Ambrosetti - A. Marino (eds.), Nonlinear Analysis, a tribute in honour of Giovanni Prodi. Quaderni della Scuola Normale Superiore, Pisa 1991. 1162728 0763.35087 10.1007/BF00946631 Rabinowitz, P. H., On a class of nonlinear Schrödinger equations. Z. Angew. Math. Phys., 43, 1992, 270-291. 1249107 0803.58013 Séré, E., Looking for the Bernoulli shift. Ann. Inst. H. Poincaré, Anal. non linéaire, 10, 1993, 561-590. 454365 0356.35028 Strauss, W. A., Existence of solitary waves in higher dimensions. Comm. Math. Phys., 55, 1979, 149-162. 960098 0673.35005 10.1112/plms/s3-57.3.511 Stuart, C. A., Bifurcation in \( L^{p} (\mathbb{R}^{n})\) L p R n for a semilinear elliptic equation. Proc. London Math. Soc., (3), 57, 1988, 511-541.
oai:bdim.eu:RLIN_1993_9_4_4_273_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1993_9_4_4_273_0 Periodic Solutions of Second Order Nonautonomous Systems with the Potentials Changing Sign Soluzioni periodiche di sistemi non autonomi del secondo ordine con potenziali che cambiano segno Girardi Mario Matzeu Michele 1993 12 4 RLIN_1993_9_4 9 4 RLIN_1993_9_4_4 273 277 1269617 0799.58064 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Some existence and multiplicity results for periodic solutions of second order nonautonomous systems with the potentials changing sign are presented. The proofs of the existence results rely on the use of a linking theorem and the Mountain Pass theorem by Ambrosetti and Rabinowitz [2]. The multiplicity results are deduced by the study of constrained critical points of minimum or Mountain Pass type.

Vengono presentati alcuni risultati di esistenza e di molteplicità per soluzioni periodiche di sistemi non autonomi del secondo ordine con potenziali che cambiano segno. Le prove dei risultati di esistenza si basano sull'uso di un teorema di «linking» e sul teorema del Passo Montano di Ambrosetti e Rabinowitz [2]. I risultati di molteplicità sono dedotti dallo studio di punti critici vincolati di tipo minimo o Passo Montano.

Periodic solutions Potentials changing sign Second order nonautonomous systems provider bdim
1383913 0809.35022 10.1007/BF01206962 ALAMA, S. - TARANTELLO, G., On semilinear elliptic equations with indefinite nonlinearities. Arch. Rat. Mech. Analysis, to appear. 370183 0273.49063 AMBROSETTI, A. - RABINOWITZ, P. H., Dual variational methods in critical point theory and applications. J. Funct. Anal., 14, 1973, 349-381. 1287560 0808.58013 10.1006/jdeq.1994.1103 BENNAOUM, A. K. - TROESTLER, C. - WILLEM, M., Existence and multiplicity results for homogeneous second order differential equations. J. Diff. Eq., to appear. 1205441 0771.34031 YANHENG, DING - GIRARDI, M., Periodic and homoclinic solutions to a class of Hamiltonian systems with the potentials changing sign. Dynamical Systems and Applications, to appear. 1051888 0707.70003 EKELAND, I., Convexity methods in Hamiltonian mechanics. Springer-Verlag, 1990. 796195 0594.58035 10.1007/BF01388776 EKELAND, I. - HOFER, H., Periodic solutions with prescribed minimal period for convex autonomous Hamiltonian systems. Invent. Math., 81, 1985, 155-188. 1389092 0846.34033 GIRARDI, M. - MATZEU, M., Some multiplicity results for suhharmonic solutions to second order nonautonomous systems. Proceedings of the First World Congress of Nonlinear Analysis. Tompe, Florida, August 19-26 1992, to appear. 812787 0573.58007 10.1112/jlms/s2-31.3.566 HOFER, H., A geometric description of the neighbourhood of a critical point given by the mountain-pass theorem. J. London Math. Soc., 31, (2), 1985, 566-570. 1122304 0736.34041 10.1016/0022-0396(91)90020-A LASSOUED, L., Periodic solutions of a second order superquadratic system with change of sign of potential. J. Diff. Eq., 93, 1991, 1-18. 467823 0358.70014 RABINOWITZ, P. M., Periodic solutions of Hamiltonian systems. Comm. Pure Appl. Math., 31, 1978, 157-184.
oai:bdim.eu:RLIN_2004_9_15_3-4_161_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2004_9_15_3-4_161_0 Free boundary problems arising in tumor models Friedman Avner 2004 12 15 RLIN_2004_9_15 9 3-4 RLIN_2004_9_15_3-4 161 168 2148876 1162.35460 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

We consider several simple models of tumor growth, described by systems of PDEs, and describe results on existence of solutions and on their asymptotic behavior. The boundary of the tumor region is a free boundary. In §1 the model assumes three types of cells, proliferating, quiescent and necrotic, and the corresponding PDE system consists of elliptic, parabolic and hyperbolic equations. The model in §2 assumes that the tumor has only proliferating cells. Finally in §3 we consider a model for treatment of tumor, described by a system of elliptic and hyperbolic equations.

Free boundary problems Asymptotic stability Tumor models Treatment of cancer provider bdim
1976462 1031.35151 10.1081/PDE-120020486 BAZALIY, B.V. - FRIEDMAN, A., A free boundary problem for an elliptic-parabolic system: Application to a model of tumor growth. Communications in PDE, 28, 2003, 517-560. 2010327 1089.35079 10.1512/iumj.2003.52.2317 BAZALIY, B.V. - FRIEDMAN, A., Global existence and stability for an elliptic-parabolic free boundary problem; An application to a model of tumor growth. Indiana University Math. J., 52, 2003, 1265-1304. 0836.92011 BYRNE, H.M. - CHAPLAIN, M.A.J., Growth of nonnecrotic tumours in the presence and absence of inhibitors. Mathematical Biosciences, 181, 1995, 130-151. 1082.35166 CHEN, X. - CUI, S. - FRIEDMAN, A., A hyperbolic free boundary problem modeling tumor growth: Asymptotic behavior. To appear. 2049029 1054.35144 10.1137/S0036141002418388 CHEN, X. - FRIEDMAN, A., A free boundary problem for elliptic-hyperbolic system: An application to tumor growth. SIAM J. Math. Analysis, 35, 4, 2003, 974-976. 1751267 0998.92022 10.1016/S0025-5564(99)00063-2 CUI, S. - FRIEDMAN, A., Analysis of a mathematical model of the effect of inhibitors on the growth of tumors. Math. Biosci., 164, 2000, 103-137. 1990162 1036.34018 10.1090/S0002-9947-03-03137-4 CUI, S. - FRIEDMAN, A., A free boundary problem for a singular system of differential equations: An application to a model of tumor growth. Trans. AMS, 355, 2003, 3537-3590. 1980470 1040.35143 10.4171/IFB/76 CUI, S. - FRIEDMAN, A., A hyperbolic free boundary problem modeling tumor growth. Interfaces and Free Boundaries, 5, 2003, 159-181. 2011787 1054.35145 FONTELOS, M. - FRIEDMAN, A., Symmetry-breaking bifurcations of free boundary problems in three dimensions. Asymptotic Analysis, 35, 2003, 187-206. 1684873 0944.92018 10.1007/s002850050149 FRIEDMAN, A. - REITICH, F., Analysis of a mathematical model for the growth of tumors. J. Math. Biol., 38, 1999, 262-284. 1806728 0983.35019 10.1090/S0002-9947-00-02715-X FRIEDMAN, A. - REITICH, F., Symmetry-breaking bifurcation of analytic solutions to free boundary problems: An application to a model of tumor growth. Trans. Amer. Math. Soc., 353, 2000, 1587-1634. 1832995 1013.92024 10.1142/S021820250100101X FRIEDMAN, A. - REITICH, F., On the existence of spatially patterned dormant malignancies in a model for the growth of non-necrotic vascular tumor. Math. Models and Methods in Appl. Sciences, 77, 2001, 1-25. 2029005 1052.92027 10.1007/s00285-003-0199-5 FRIEDMAN, A. - TAO, Y., Analysis of a model of a virus that replicates selectively in tumor cells. J. Math. Biology, 47, 2003, 391-423. 429164 GREENSPAN, H., On the growth and stability of cell cultures and solid tumors. J. Theor. Biol., 56, 1976, 229-242. PETTET, G. - PLEASE, C.P. - TANDALL, M.J. - MCELWAIN, D., The migration of cells in multicell tumor spheroids. Bull. Math. Biol., 63, 2001, 231-257. WU, J.T. - BYRNE, H.M. - KIRN, D.H. - WEIN, L.M., Modeling and analysis of a virus that replicate selectively in tumor cells. Bull. Math. Biology, 63, 2001, 731-768.
oai:bdim.eu:RLIN_1992_9_3_3_223_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1992_9_3_3_223_0 General construction of Banach-Grassmann algebras Costruzione generale di algebre di Banach-Grassmann Pestov Vladimir G. 1992 9 3 RLIN_1992_9_3 9 3 RLIN_1992_9_3_3 223 231 1186918 0745.46050 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

We show that a free graded commutative Banach algebra over a (purely odd) Banach space \( E \) E is a Banach-Grassmann algebra in the sense of Jadczyk and Pilch if and only if \( E \) E is infinite-dimensional. Thus, a large amount of new examples of separable Banach-Grassmann algebras arise in addition to the only one example previously known due to A. Rogers.

Si mostra che un'algebra di Banach libera graduato-commutativa su uno spazio di Banach \( E \) E puramente dispari è un'algebra di BanachGrassmann nel senso di Jadczyk e Pilch se e solo se \( E \) E ha dimensione infinita. É quindi possibile ottenere un gran numero di nuovi esempi di algebre di Banach-Grassmann separabili, in aggiunta all'unico esempio precedentemente noto, dovuto ad A. Rogers.

Banach-Grassmann Algebras Super analysis Graded algebras provider bdim
1175751 0743.53001 10.1007/978-94-011-3504-7 BARTOCCI, C. - BRUZZO, U. - HERNÁNDEZ RUIPÉREZ, D., The geometry of supermanifolds. Kluwer Academic Publishers Group, Dordrecht 1991. 901695 0638.46054 10.1007/BF00403465 KOBAYASHI, Y. - NAGAMACHI, SH., Usage of infinite-dimensional nuclear algebras in superanalysis. Lett. Math. Phys., 14, 1987, 15-23. 749002 0552.46023 VLADIMIROV, V. S. - VOLOVICH, I. V., Superanalysis I. Differential calculus. Theor. Math. Phys., 60, 1984, 317-335. 940661 0665.46031 10.1070/RM1988v043n02ABEH001713 A. Yu KHRENNIKOV, , Functional superanalysis. Russian Math. Surveys, 43, 1988, 103-137. 991667 0636.58011 10.1112/jlms/s2-39.2.347 BRYANT, P., DeWitt supermanifolds and infinite-dimensional ground rings. J. London Math. Soc., 39, 1989, 347-368. 1026098 0707.58006 CHOQUET, Y., Graded Bundles and Supermanifolds. Monographs and Textbooks in Physical Sciences, Bibliopolis, Naples 1990. 778559 0623.53042 DE WITT, B. S., Supermanifolds. Cambridge University Press, London 1984. 914369 0659.58001 BEREZIN, F. A., Introduction to superanalysis. D. Reidel Publ. Co., Dordrecht-Boston, MA, 1987. 51445 0047.35802 ARENS, R., A generalization of normed rings. Pacif. J. Math., 2, 1952, 455-471. 51444 0047.35502 MICHAEL, E., Locally multiplicatively-convex topological algebras. Mem. Amer. Math. Soc., 1952, 79 pp. 1083081 0693.17015 10.1063/1.529126 PESTOV, V., Even sectors of Lie superalgebras as locally convex Lie algebras. J. Math. Phys., 32, 1991, 24-32. 1005646 0676.58015 PESTOV, V., Interpreting superanalyticity in terms of convergent series. Class. Quantum Grav., 6, 1989, L145-L159. 1179836 0681.15014 10.1016/0034-4877(91)90047-Q PESTOV, V., Ground algebras for superanalysis. Rep. Math. Phys., 1991, to appear. 603500 0464.58006 JADCZYK, A. - PILCH, K., Superspaces and supersymmetries. Commun. Math. Phys., 78, 1981, 373-390. 824672 0587.58013 10.1007/BF00417460 BRUZZO, U. - CIANCI, R., On the structure of superfields in a field theory on a supermanifold. Lett. Math. Phys., 11, 1986, 21-26. 859469 0593.53056 BRUZZO, U., Geometry of rigid supersymmetry. Hadronic J., 9, 1986, 25-30. 574696 0447.58003 10.1063/1.524585 ROGERS, A., A global theory of supermanifolds. J. Math. Phys., 21, 1980, 1352-1365. 887013 0636.17009 10.1063/1.527519 TEOFILATTO, P., Enlargeable graded Lie algebras of supersymmetry. J. Math. Phys., 28, 1987, 991-996. 772783 JADCZYK, A. - PILCH, K., Classical limit of CAR and self-duality in the infinite-dimensional Grassmann algebra. In: B. JANCEWICZ - J. LUKIERSKI , Quantum Theory of Particles and Fields. World Scientific, Singapore 1983. 0362.46013 LINDENSTRAUSS, J. - TZAFRIRI, K., Classical Banach Spaces. Vol. 1, Springer Verlag, Berlin-Heidelberg-New York 1977. 193469 0217.16002 SCHAEFER, H. H., Topological Vector Spaces. The Macmillan Co., New York-London 1966. 1031991 0688.46025 KHELEMSKII, A. YA., Banach and Polynormed Algebras. General Theory, Representations, Homology. Nauka, Moscow 1989 (in Russian). 954833 0641.53001 MANIN, YU. I., Gauge field theory and complex geometry. Springer Verlag, Berlin 1988. 231303 0184.12701 CARTAN, H., Formes Différentielles. Hermann, Paris 1967. 899880 10.1002/prop.2190350503 KUPSCH, J., Measures for fermionic integration. Fortschr. Phys., 35, 1987, 415-436. 1000941 0677.58009 10.1007/BF01015775 IVASHCHUK, V. D., On annihilators in infinite-dimensional Grassmann-Banach algebras. Teor. i mat. fizika, 79, 1989, 30-40 (in Russian). 622722 0488.22001 ARKHANGEL'SKII, A. V., Classes of topological groups. Russian Math. Surveys, 36, 1981, 151-174. 208930 0151.44001 BEREZIN, F. A., The Method of Second Quantization. Academic Press, New York 1966.
oai:bdim.eu:RLIN_1992_9_3_1_45_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1992_9_3_1_45_0 Remarks on Riemannian Thermodynamics Contributo alla Termodinamica Riemanniana Napolitano Luigi G. Albanese Carlo 1992 3 3 RLIN_1992_9_3 9 1 RLIN_1992_9_3_1 45 50 1159999 0758.53060 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

The postulates of macroscopic thermodynamics give us the possibility to endow the set of thermodynamic states with the structure of a riemannian manifold. Two alternatives are available: the first one is to introduce on the set of thermodynamic equilibrium states a metric induced by an embedding metric space (extrinsic approach), the second one is to introduce the stability metric (intrinsic approach). Between the two choices the second one looks more promising on the basis of its capability of yielding physical informations. An open problem is however the tensoriality of the stability metric.

A partire dai postulati della termodinamica macroscopica viene dimostrato come l'insieme degli stati termodinamici può essere dotato di struttura di varietà riemanniana. A tale scopo ci sono due modi di introdurre una metrica: un modo estrinseco, derivandola da uno spazio metrico immergente, oppure un modo intrinseco usando una metrica autonoma. Tra le due scelte la seconda sembra migliore per le informazioni di carattere fisico che è capace di fornire. Resta un problema aperto: il carattere tensoriale della metrica scelta. Per finire viene delineata l'applicazione dei metodi geometrici introdotti a sistemi complessi.

Thermodynamics Riemannian geometry Hypersonics provider bdim
0095.23301 CALLEN, H. B., Thermodynamics. New York 1960. TISZA, L., Generalized Thermodynamics. Cambridge Mass. 1966. 541358 MISTURA, L., On the solution of Gibbs-Duhem equation. J. Phys., A, vol. 12, fasc. 9, 1979, 1547-1562. WEINHOLD, F., The geometry of thermodynamics. Phys. Today, vol. 29, 1976, 29-34. 378597 WEINHOLD, F., Metric geometry of equilibrium thermodynamics. J. Chem. Phys., vol. 63, fasc. 6, 1975, 2479-2483. RUPPEINER, G., Thermodynamics: a riemannian geometric model. Phys. Rev., A, vol. 20, fasc. 4, 1979, 1608-1613. 762409 10.1103/PhysRevA.30.1994 GILMORE, R., Length and curvature in the geometry of thermodynamics. Phys. Rev., A, vol. 30, fasc. 4, 1984, 1994-1997. NAPOLITANO, L. G., Thermodynamique des Systems Composites. Paris 1971.
oai:bdim.eu:RLIN_1992_9_3_1_69_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1992_9_3_1_69_0 Note on a mixed variational principle in finite elasticity Su di un principio variazionale misto in elasticità finita Maugin Gérard A. Trimarco Carmine 1992 3 3 RLIN_1992_9_3 9 1 RLIN_1992_9_3_1 69 74 1160002 0760.73025 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

In the present context the variation is performed keeping the deformed configuration fixed while a suitable material stress tensor \( \mathcal{S} \) S and the material coordinates are required to vary independently. The variational principle turns out to be equivalent to an equilibrium problem of placements and tractions prescribed at the boundary of a body of finite extent.

Si fissa la configurazione deformata di un solido elastico mentre si richiede che le coordinate materiali e che \( \mathcal{S} \) S , un opportuno tensore materiale degli sforzi, possano variare in modo indipendente. Si tova che il principio variazionale proposto corrisponde ad un problema di equilibrio meccanico.

Elastostatics Conservation laws Fracture provider bdim
770388 0541.73044 OGDEN, R. W., Nonlinear Elastic Deformations. J. Wiley & S., Ellis Horwood Series, Chichester 1984. 489190 0323.73011 ESHELBY, J. D., The Elastic Energy Momentum Tensor. J. of Elasticity, 5, 1975, 321-335. 0602.73018 BATRA, R. C., The force on a Lattice Defect in an Elastic Body. J. of Elasticity, 17, 1981, 3-8. , 1076041 0714.73029 10.1007/BF01172974 EPSTEIN, M. - MAUGIN, G. A., The Energy Momentum Tensor and Material Uniformity in Finite Elasticity. Acta Mechanica, 83, 1990, 127-133. 0479.73094 HERRMANN, A. G., Material Momentum Tensor and Path independent Integrals of Fracture Mechanics. Int. J. Solids and Structures, 18, 1982, 319-324. ESHELBY, J. D., The force on a Disclination in a Liquid Crystal. Philosophical Magazine, 42A, 1980, 359-367. RICE, J. R., A path independent Integral and the approximate Analysis of strain Concentrations by notches and cracks. J. Appl. Mechs., 35, 1968, 379-386. 317635 0292.73060 BUI, D., Dualité entre les intégrales indépendantes du contour dans la théorie des solides fissurés. C. R. Acad. Sc. Paris, Série A, t. 276, 1973, 1425-1428. 58411 0051.16303 REISSNER, E., On a Variational Theorem for Finite Elastic Deformations. J. Math. Physics, 32, 1953, 129-135. 65363 0057.40006 MANACORDA, T., Sopra un Principio Variazionale di E. Reissner per la Statica dei Mezzi Continui. Boll. U.M.I., 9 (232A), 1954; 154-159. TRUESDELL, C. A. - TOUPIN, R. A.. In: Encyclopedia of Physics, vol. III/1, Springer, Berlin 1960. 45.1012.01 HELLINGER, E., Die allgemeinen Ansätze der Mechanik der Kontinua. Enz. Math. Wiss., 4, 1914, 602-694. 95628 0079.17602 GREEN, A. E. - RIVLIN, R. S., The Mechanics of Non-Linear Materials with Memory. Arch. Rat. Mech. An., 1, 1957, 1-21; 470.
oai:bdim.eu:RLIN_1991_9_2_3_235_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1991_9_2_3_235_0 Precessioni ad asse verticale del girostato pesante Precessions with vertical axis for a heavy gyrostat Saccomandi Giuseppe 1991 9 2 RLIN_1991_9_2 9 3 RLIN_1991_9_2_3 235 240 1135428 0755.70009 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Si esamina la possibilità dinamica di precessioni ad asse verticale di un girostato, alla Volterra, pesante e fissato senza attrito per un suo punto. Si riconosce che per essere possibili moti di questo tipo, necessariamente, almeno una delle due velocità di precessione o rotazione propria deve essere costante.

We have examined the dynamical possibility of precession motions with vertical axis for an heavy «Volterra-type» gyrostat with a fixed point without friction. We have been able to show that these kinds of motions are dynamically possible only if the rotation speed or the precession speed is constant.

Gyrostat Precession Semiregular precession provider bdim
521353 0359.70009 BALLI, R., Precessioni ad asse verticale del solido pesante. Rend. Sem. Mat. Univ. Padova, 55, 1976, 91-104. 53.0732.03 LEVI-CIVITA, T. - AMALDI, U., Lezioni di Meccanica Razionale. Nicola Zanichelli, Bologna 1927. 0277.70002 GRIOLI, G., Particular Solutions in Stereodynamics. In: Stereodynamics. Edizioni Cremonese, Roma 1972. GRIOLI, G., Lezioni di Meccanica Razionale. Edizioni Libreria Cortina, Padova 1983. 0416.70012 Pucci, E., Una classe di \( \infty^{2} \) 2 precessioni non regolari del girostato soggetto a sollecitazione newtoniana. Atti Acc. Lincei Rend. fis., s. 8, vol. 62, 1977, 348-352. 478862 0385.70013 Pucci, E., Possibilità dinamica di precessioni semiregolari di seconda specie del girostato in campo newtoniano. Riv. Mat. Univ. Parma, (4) 3, 1977, 261-211. 478861 0349.70002 E. Pucci, Sulle precessioni non regolari del corpo rigido soggetto a forze di tipo newtoniano. Rendiconti di Matematica, s. VI, (3) 9, 1976, 365-378.
oai:bdim.eu:RLIN_2001_9_12_4_199_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2001_9_12_4_199_0 Some results on critical groups for a class of functionals defined on Sobolev Banach spaces Alcuni risultati sui gruppi critici per una classe di funzionali definiti su spazi di Sobolev Banach Cingolani Silvia Vannella Giuseppina 2001 12 12 RLIN_2001_9_12 9 4 RLIN_2001_9_12_4 199 203 1898461 1072.58005 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

We present critical groups estimates for a functional $f$ f defined on the Banach space $W^{1,p}_{0}(\Omega)$ W 0 1 , p Ω , $\Omega$ Ω bounded domain in $\mathbb{R}^{N}$ R N , $2 < p < \infty$ 2 < p < , associated to a quasilinear elliptic equation involving $p$ p -laplacian. In spite of the lack of an Hilbert structure and of Fredholm property of the second order differential of $f$ f in each critical point, we compute the critical groups of $f$ f in each isolated critical point via Morse index.

Presentiamo stime di gruppi critici per un funzionale $f$ f definito sullo spazio di Banach $W^{1,p}_{0}(\Omega)$ W 0 1 , p Ω , $\Omega$ Ω dominio limitato in $\mathbb{R}^{N}$ R N , $2 < p < \infty$ 2 < p < , associato a una equazione ellittica che coinvolge il $p$ p -laplaciano. Nonostante la mancanza di una struttura di Hilbert e di proprietà di Fredholm del differenziale secondo di $f$ f nei punti critici, valutiamo i gruppi critici di $f$ f in ogni punto critico isolato mediante l’indice di Morse.

p-laplacian Critical groups estimates Morse index provider bdim
1785469 0973.35161 10.1007/s002050000101 Benci, V. - D'Avenia, P. - Fortunato, D. - Pisani, L., Solitons in several space dimensions: a Derrick's problem and infinitely many solutions. Arch. Rational Mech. Anal., 154, 2000, 297-324. 742038 0534.58020 Chang, K., Morse Theory on Banach space and its applications to partial differential equations. Chin. Ann. of Math., 4B, 1983, 381-399. 1703528 0960.58006 Chang, K., Morse theory in nonlinear analysis. In: A. Ambrosetti - K.C. Chang - I. Ekeland (eds.), Nonlinear Functional Analysis and Applications to Differential Equations. World Scientific, Singapore 1998. 1961517 1023.58004 10.1016/S0294-1449(02)00011-2 Cingolani, S. - Vannella, G., Critical groups computations on a class of Sobolev Banach spaces via Morse index. To appear. 1448826 1139.35335 10.1006/jdeq.1996.3254 Corvellec, J.N. - Degiovanni, M., Nontrivial solutions of quasilinear equations via nonsmooth Morse theory. J. Diff. Eqs., 136, 1997, 268-293. 1035.58010 Lancelotti, S., Morse index estimates for continuous functionals associated with quasilinear elliptic equations. Dip. Mat. Politecnico Torino 14/1999. 727034 0488.35017 10.1016/0022-0396(84)90105-0 Tolksdorf, P., Regularity for a more general class of quasilinear elliptic equations. J. Diff. Eqs., 51, 1984, 126-150. 700735 0515.35024 10.1080/03605308308820285 Tolksdorf, P., On the Dirichlet problem for a quasilinear equations in domains with conical boundary points. Comm. Part. Diff. Eqs., 8, 1983, 773-817. 464304 0344.58012 Tromba, A.J., A general approach to Morse theory. J. Diff. Geometry, 12, 1977, 47-85. 377979 0241.58002 Uhlenbeck, K., Morse theory on Banach manifolds. J. Funct. Anal., 10, 1972, 430-445.
oai:bdim.eu:RLIN_1996_9_7_3_125_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1996_9_7_3_125_0 Curry algebras \( N_{1} \) N 1 Le algebre «Curry» \( N_{1} \) N 1 Abe Jair Minoro 1996 12 7 RLIN_1996_9_7 9 3 RLIN_1996_9_7_3 125 128 1454407 0871.03015 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

In [6] da Costa has introduced a new hierarchy \( N_{i} \) N i , \( 1 \le i \le w \) 1 i w of logics that are both paraconsistent and paracomplete. Such logics are now known as non-alethic logics. In this article we present an algebraic version of the logics \( N_{i} \) N i and study some of their properties.

Nell'articolo [6] da Costa ha introdotto una nuova gerarchia \( N_{i} \) N i , \( 1 \le i \le w \) 1 i w di logiche che sono al tempo stesso paraconsistenti e paracomplete. Tali logiche sono adesso conosciute come logiche nonaletiche. In questo articolo presentiamo una versione algebrica della logica \( N_{i} \) N i , e studiamo alcune proprietà.

Algebraic logic Paraconsistent logic Paracomplete logic Non-alethic logic provider bdim
940201 0648.03015 ABE, J. M., A note on Curry algebras. Bulletin of the Section of Logic, Polish Academy of Sciences, vol. 16, n. 4, 1987, 151-158. BARROS, C. M. - DA COSTA, N. C. A. - ABE, J. M., Topicos de Teoria dos Sistemas Ordenados, volume II: Sistemas de Curry. 1993, to appear. 434751 0163.24209 CURRY, H. B., Foundations of Mathematical Logic. Dover, New York 1977. 0118.01211 DA COSTA, N. C. A., Calculs propositionnels pour les systèmes formels inconsistants. Comptes Rendus de l'Académie des Sciences de Paris, 1963, 3790-3792. 354361 0236.02022 DA COSTA, N. C. A., On the theory of inconsistent formal systems. Notre Dame Journal of Formal Logic, 1974, 497-510. 1142433 0741.03012 DA COSTA, N. C. A., Logics that are both paraconsistent and paracomplete. Atti Acc. Lincei Rend. fis., s. 8, vol. 83, 1989, 29-32. 976943 0663.03012 DA COSTA, N. C. A. - MARCONI, D., A note on paracomplete logic. Atti Acc. Lincei Rend. fis., s. 8, vol. 80, 1986, 504-509. 51790 0047.00703 KLEENE, S. C., Introduction to Metamathematics. Van Nostrand, Princeton 1952.
oai:bdim.eu:RLIN_1990_9_1_2_117_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1990_9_1_2_117_0 Multivalued nonpositone problems Problemi di tipo «non-positone» a multivalori Arcoya David Calahorrano Marco 1990 5 1 RLIN_1990_9_1 9 2 RLIN_1990_9_1_2 117 123 1081394 0719.35024 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

In this note, the existence of non-negative solutions for some multivalued non-positone elliptic problems is studied.

In questa nota si studia la esistenza di soluzioni non negative di certi problemi a multivalori ellittici non lineari.

Elliptic multivalued problem Discontinuous nonlinearities Sub-linear and superlinear provider bdim
1001862 0687.35033 10.1016/0022-247X(89)90070-X AMBROSETTI, A. - BADIALE, M., The dual variational principle and elliptic problems with discontinuous nonlinearities. J. Math. Anal. Appl., 140-2, 1989, 363-373. 563992 0433.35026 10.1016/0022-247X(80)90287-5 AMBROSETTI, A. - HESS, P., Positive solutions of asymptotically linear elliptic eigenvalue problems. J. Math. Anal. Appl., 73, 1980, 411-422. 370183 0273.49063 AMBROSETTI, A. - RABINOWITZ, P. H., Dual variational methods in critical point theory and applications. J. Funct. Anal, 14, 1973, 349-381. 996760 0736.35039 BROWN, K. J. - CASTRO, A. - SHTVAJI, R., Non-existence of radially symmetric non-negative solutions for a class of semi-positone problems. Diff. and Int. Eqns., 2, 1989, 541-545. 949875 0686.35044 10.2307/2047429 CASTRO, A. - SHIVAJI, R., Non negative solutions for a class of radially symmetric non-positone problems. Proc. American Math. Soc, 106-3, 1989, 735-740. 614246 0487.49027 10.1016/0022-247X(81)90095-0 CHANG, K. C., Variational methods for nondifferentiahle functionals and their applications to partial differential equations. J. Math. Anal. Appl., 80, 1981, 102-129. 544879 0425.35020 GIDAS, B. - NI, W. M. - NIRENBERG, L., Symmetry and related properties via the maximum principle. Comm. Math. Phys., 68, 1979, 209-243. 43486 0044.38301 POLYA, G. - SZEGO, G., Isoperimetric inequalities in mathematical physics. Princeton University Press, 1951. 0142.38701 MORREY, C. B., Multiple integrals in calculus of variations. Springer, Berlin 1966. 481227 0393.34010 STUART, C. A., Differential equations with discontinuous nonlinearities. Arch. Rat. Mech. & Analysis, 63, 1976, 59-75.
oai:bdim.eu:RLIN_2003_9_14_3_189_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2003_9_14_3_189_0 Caccioppoli estimates and very weak solutions of elliptic equations Iwaniec Tadeusz Sbordone Carlo 2003 9 14 RLIN_2003_9_14 9 3 RLIN_2003_9_14_3 189 205 2064266 1225.35069 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Caccioppoli estimates are instrumental in virtually all analytic aspects of the theory of partial differential equations, linear and nonlinear. And there is always something new to add to these estimates. We emphasize the fundamental role of the natural domain of definition of a given differential operator and the associated weak solutions. However, we depart from this usual setting (energy estimates) and move into the realm of the so-called very weak solutions where important new applications lie. We carry out this task deliberately with a restricted generality in interest of readability, and we hope it pays off handsomely in mathematical insights.

Caccioppoli inequality Very weak solutions Elliptic equations provider bdim
0928.00071 ALVINO, A. - CARBONE, L. - SBORDONE, C. - TROMBETTI, G., In ricordo di Renato Caccioppoli. Giannini Editore, Napoli 1999. 1815249 1009.30015 10.1215/S0012-7094-01-10713-8 ASTALA, K. - IWANIEC, T. - SAKSMAN, E., Beltrami operators in the plane. Duke Math. J., 107, n. 1, 2001, 27-56. 1758918 0966.30001 BAERNSTEIN, A. - MONTGOMERY-SMITH, S.J., Some conjectures about integral means of $\partial f$ f and $\bar{\partial f}$ f ¯ . In: C. KISELMAN (ed.), Complex analysis and differential equations (Uppsala, 1997). Acta Univ. Upsaliensis Skr. Uppsala Univ. C Organ. Hist., 64, 92-109. 1442167 0876.60026 10.1006/jfan.1996.3022 BAÑUELOS, R. - LINDEMAN, A., A martingale study of the Beurling-Ahlfors transform in $\mathbb{R}^{n}$ R n . J. Funct. Anal., 145, n. 1, 1997, 224-265. 1370109 0853.60040 10.1215/S0012-7094-95-08020-X BAÑUELOS, R. - WANG, G., Sharp inequalities for martingales with applications to the Beurling-Ahlfors and Riesz transforms. Duke Math. J., 80, n. 3, 1995, 575-600. 1354907 0866.35037 BÉNILAN, P. - BOCCARDO, L. - GALLOUËT, T. - GARIEPY, R. - PIERRE, M. - VÁZQUEZ, J.L., An $L^{1}$ L 1 -theory of existence and uniqueness of solutions of nonlinear elliptic equations. Ann. Scuola Norm. Sup. Pisa Cl. Sci., (4) 22, n. 2, 1995, 241-273. 76981 0067.32503 BERS, L. - NIRENBERG, L., On a representation theorem for linear elliptic equations with discontinuous coefficients and its applications. Convegno Int. Eq. Lin. Deriv. Parz., Trieste 1954, 111-140. 1163440 0812.35043 10.1080/03605309208820857 BOCCARDO, L. - GALLOUËT, T., Nonlinear elliptic equations with right-hand side measures. Comm. Partial Differential Equations, 17, n. 3-4, 1992, 641-655. 71620 BOJARSKI, B., Homeomorphic solutions of Beltrami's systems. Dokl. Akad. Nauk SSSR, 102, 1955, 661-664. 802470 0582.30016 10.5186/aasfm.1985.1011 BOJARSKI, B., Remarks on the stability of reverse Hölder inequalities and quasiconformal mappings. Ann. Acad. Sci. Fenn. Ser. A I Math., 10, 1985, 89-94. 731786 0548.30016 BOJARSKI, B. - IWANIEC, T., Analytic foundations of the theory of quasiconformal mappings in $\mathbb{R}^{n}$ R n . Ann. Acad. Sci. Fenn. Ser. A., I 8, 1983, 257-324. 1234399 0847.26012 10.1006/jfan.1993.1098 BREZIS, H. - FUSCO, N. - SBORDONE, C., Integrability for the Jacobian of orientation preserving mappings. J. Funct. Anal., 115, n. 2, 1993, 425-431. 1672754 1064.35505 BUDNEY, L. - IWANIEC, T. - STROFFOLINI, B., Removability of singularities of $a$ a -harmonic functions. Differential Integral Equations, 12, n. 2, 1999, 261-274. 46536 0043.31404 CACCIOPPOLI, R., Limitazioni integrali per le soluzioni di un’equazione lineare ellitica a derivate parziali. Giorn. Mat. Battaglini, (4) 4(80), 1951, 186-212. 1225511 0864.42009 COIFMAN, R. - LIONS, P.L. - MEYER, Y. - SEMMES, S., Compensated compactness and Hardy spaces. J. Math. Pures Appl., (9) 72, n. 3, 1993, 247-286. 1760541 0958.35045 DAL MASO, G. - MURAT, F. - ORSINA, L. - PRIGNET, A., Renormalized solutions of elliptic equations with general measure data. Ann. Scuola Norm. Sup. Pisa Cl. Sci., (4) 28, n. 4, 1999, 741-808. 1748270 0937.35065 10.1515/crll.2000.022 DOLZMANN, G. - HUNGERBHLER, N. - MÜLLER, S., Uniqueness and maximal regularity for nonlinear elliptic systems of $n$ n -Laplace type with measure valued right hand side. J. Reine Angew. Math., 520, 2000, 1-35. 417568 0347.35039 ELCRAT, A. - MEYERS, N., Some results on regularity for solutions of non-linear elliptic systems and quasi-regular functions. Duke Math. J., 42, 1975, 121-136. 781720 0599.46035 FIGIEL, T. - IWANIEC, T. - PEŁCZYǸSKI, A., Computing norms and critical exponents of some operators in $L^{p}$ L p -spaces. Studia Math., 79, 1984, 228-274. 1489454 0891.35039 FIORENZA, A. - SBORDONE, C., Existence and uniqueness results for solutions of nonlinear equations with right hand side in $L^{1}$ L 1 . Studia Math., 127, n. 3, 1998, 223-231. 1398170 0865.46017 FRANCHI, B. - SERRA CASSANO, F., Gehring's lemma for metrics and higher integrability of the gradient for minimizers of noncoercive variational functionals. Studia Math., 120, n. 1, 1996, 1-22. 1057235 0727.49021 10.1002/cpa.3160430505 FUSCO, N. - SBORDONE, C., Higher integrability of the gradient of minimizers of functionals with non-standard growth conditions. Comm. Pure Appl. Math., 43, n. 5, 1990, 673-683. 402038 0258.30021 GEHRING, F.W., The $L^{p}$ L p -integrability of the partial derivatives of a quasiconformal mapping. Acta Math., 130, 1973, 265-277. 717034 0516.49003 GIAQUINTA, M., Multiple integrals in the calculus of variations and nonlinear elliptic systems. Annals of Mathematics Studies, 105, Princeton 1983. 549962 0409.35015 GIAQUINTA, M. - MODICA, G., Regularity results for some classes of higher order nonlinear elliptic systems. J. Reine Angew. Math., 311/312, 1979, 145-169. 414869 0339.30018 GOLDSTEIN, V. M. - VODOP'YANOV, S. K., Quasiconformal mappings and spaces of functions with first generalized derivatives. Sibirsk. Mat. Z., 17, n. 3, 1976, 515-531. 1230483 0784.49013 GRECO, L., A remark on the equality $det \, Df = Det \, Df$ d e t D f = D e t D f . Differential and Integral Equations, 6, n. 5, 1993, 1089-1100. 1259100 0848.58051 GRECO, L. - IWANIEC, T., New inequalities for the Jacobian. Ann. Inst. H. Poincaré Anal. Non Linéaire, 11, n. 1, 1994, 17-35. 1355401 0855.42009 10.1512/iumj.1995.44.1990 GRECO, L. - IWANIEC, T. - MOSCARIELLO, G., Limits of the improved integrability of the volume forms. Indiana Univ. Math. J., 44, n. 2, 1995, 305-339. 1428651 0869.35037 10.1007/BF02678192 GRECO, L. - IWANIEC, T. - SBORDONE, C., Inverting the $p$ p -harmonic operator. Manuscripta Math., 92, n. 2, 1997, 249-258. 1145.58006 HAJŁASZ, P. - IWANIEC, T. - MALÝ, J. - ONNINEN, J., Weakly differentiable mappings between manifolds. Preprint. ISTITUTO ITALIANO PER GLI STUDI FILOSOFICI: SEMINARI DI SCIENZE, , Il pensiero matematico del XX secolo e l’opera di Renato Caccioppoli. Atti della giornata di studi tenuta a Pisa il 10 aprile 1987 per iniziativa dell’Istituto Italiano per gli Studi Filosofici e della Scuola Normale di Pisa, 1988. 719167 0577.46038 IWANIEC, T., Extremal inequalities in Sobolev spaces and quasiconformal mappings. Z. Anal. Anwendungen, 1, n. 6, 1982, 1-16. 722254 0552.35034 IWANIEC, T., Projections onto gradient fields and $L^{p}$ L p -estimates for degenerated elliptic operators. Studia Math., 75, n. 3, 1983, 293-312. 1189867 0785.30009 10.2307/2946602 IWANIEC, T., $p$ p -harmonic tensors and quasiregular mappings. Ann. of Math., (2) 136, n. 3, 1992, 589-624. 1833892 1006.30016 10.1007/s002220100130 IWANIEC, T. - KOSKELA, P. - ONNINEN, J., Mappings of finite distortion: monotonicity and continuity. Invent. Math., 144, n. 3, 2001, 507-531. 1922197 1017.30024 IWANIEC, T. - KOSKELA, P. - ONNINEN, J., Mappings of finite distortion: Compactness. Ann. Acad. Sci. Fenn. Math., 27, 2002, 391-417. 1047.30010 IWANIEC, T. - KOSKELA, P. - MARTIN, G. - SBORDONE, C., Mappings of finite distortion: $L^{n} \log^{a}L$ L n log a L . J. London Math. Soc., to appear. 1241286 0793.58002 10.1007/BF00411477 IWANIEC, T. - LUTOBORSKI, A., Integral estimates for null Lagrangians. Arch. Rational Mech. Anal., 125, n. 1, 1993, 25-79. 1859913 1045.30011 IWANIEC, T. - MARTIN, G., Geometric function theory and non-linear analysis. Oxford Mathematical Monographs, Oxford Univ. Press, 2001. 1208562 0785.30008 10.1007/BF02392454 IWANIEC, T. - MARTIN, G., Quasiregular mappings in even dimensions. Acta Math., 170, n. 1, 1993, 29-81. 1972489 pre02002540 IWANIEC, T. - MIGLIACCIO, L. - MOSCARIELLO, G. - PASSARELLI DI NAPOLI, A., A priori estimates for nonlinear elliptic complexes. Advances on Diff. Eq., 8 (5), 2003, 513-546. 1319735 0824.30009 IWANIEC, T. - MIGLIACCIO, L. - NANIA, L. - SBORDONE, C., Integrability and removability results for quasiregular mappings in high dimensions. Math. Scand., 75, n. 2, 1994, 263-279. 1176362 0766.46016 10.1007/BF00375119 IWANIEC, T. - SBORDONE, C., On the integrability of the Jacobian under minimal hypotheses. Arch. Rational Mech. Anal., 119, n. 2, 1992, 129-143. 1288682 0802.35016 10.1515/crll.1994.454.143 IWANIEC, T. - SBORDONE, C., Weak minima of variational integrals. J. Reine Angew. Math., 454, 1994, 143-161. 1660033 0916.30015 10.1016/S0764-4442(98)80160-2 IWANIEC, T. - SBORDONE, C., Div-curl fields of finite distortion. C. R. Acad. Sci. Paris Sr. I Math., 327, n. 8, 1998, 729-734. 1849688 1068.30011 10.1016/S0294-1449(00)00058-5 IWANIEC, T. - SBORDONE, C., Quasiharmonic fields. Ann. Inst. H. Poincaré Anal. Non Linéaire, 18, n. 5, 2001, 519-572. 1747627 0963.58003 10.1007/BF02505905 IWANIEC, T. - SCOTT, C. - STROFFOLINI, B., Nonlinear Hodge theory on manifolds with boundary. Ann. Mat. Pura Appl., 177 (4), 1999, 37-115. 1693625 0954.46018 10.1017/S0308210500021508 IWANIEC, T. - VERDE, A., A study of Jacobians in Hardy-Orlicz spaces. Proc. Roy. Soc. Edinburgh, Sect. A, 129, n. 3, 1999, 539-570. 1911096 1007.35014 10.1007/s002050200197 IWANIEC, T. - VERCHOTA, G.C. - VOGEL, A.L., The Failure of Rank-One Connection. Arch. Rational Mech. Anal., 163, n. 2, 2002, 125-169. 1827080 0997.30018 10.1307/mmj/1008719040 KAUHANEN, J. - KOSKELA, P. - MALÝ, J., Mappings of finite distortion: condition N. Michigan Math. J., 49, n. 1, 2001, 169-181. 1864838 0998.30024 10.1007/s002050100162 KAUHANEN, J. - KOSKELA, P. - MALÝ, J., Mappings of finite distortion: discreteness and openness. Arch. Rational Mech. Anal., 160, n. 2, 2001, 135-151. 1205885 0797.35052 KILPELÄINEN, T. - MALÝ, J., Degenerate elliptic equations with measure data and nonlinear potentials, Ann. Scuola Norm. Sup. Pisa Cl. Sci., 19, n. 4, 1992, 591-613. 1795037 MIGLIACCIO, L. - MOSCARIELLO, G., Higher integrability of div-curl products. Ricerche Mat., 49, n. 1, 2000, 151-161. 1297249 0805.46026 MOSCARIELLO, G., On the integrability of the Jacobian in Orlicz spaces. Math. Japon., 40, n. 2, 1994, 323-329. 1470190 0920.26017 MOSCARIELLO, G. - SBORDONE, C., $A^{\infty}$ A as a limit case of reverse-Hölder inequalities when the exponent tends to 1. Ricerche Mat., 44, n. 1, 1995, n. 1, 131-144. 1078998 0713.49004 10.1515/crll.1990.412.20 MÜLLER, S., Higher integrability of determinants and weak convergence in $L^{1}$ L 1 . J. Reine Angew. Math., 412, 1990, 20-34. NAZAROV, F. - VOLBERG, A., Heating of the Beurling operator and the estimates of its norm. Amer. J. of Math., to appear. 1419292 1162.35354 PASSARELLI DI NAPOLI, A. - SBORDONE, C., Elliptic equations with right hand side in $L(\log L)^{a}$ L log L a . Rend. Accad. Sci. Fis. Mat. Napoli, 62 (4), 1995, 301-314 (1996). 369906 0279.49014 PICCININI, L. - SPAGNOLO, S., Una valutazione della regolarità delle soluzioni di sistemi ellittici variazionali in due variabili. Ann. Scuola Norm. Sup. Pisa, 27 (3), 1973, 417-429. 1655540 1073.35515 SBORDONE, C., New estimates for div-curl products and very weak solutions of PDEs. Dedicated to Ennio De Giorgi. Ann. Scuola Norm. Sup. Pisa Cl. Sci., 25 (4), n. 3-4, 1997, 739-756 (1998). 1488076 0915.46030 SBORDONE, C., Grand Sobolev spaces and their applications to variational problems. Le Matematiche (Catania), 51, n. 2, 1996, 335-347 (1997). 1419348 0835.35046 SBORDONE, C., Maximal inequalities and applications to regularity problems in the calculus of variations. Calculus of variations, applications and computations (Pont-à-Mousson, 1994). Pitman Res. Notes Math. Ser., 326, Longman Sci. Tech., Harlow 1995, 230-244. 2120914 1121.35058 10.1007/s00032-002-0013-7 SBORDONE, C., Reduction of nonlinear PDEs to linear equations. Milan Journal of Math., to appear. 1366066 0851.46023 SBORDONE, C., Nonlinear commutators and applications to the regularity properties of the Jacobian. Atti Sem. Mat. Fis. Univ. Modena, 43, n. 2, 1995, 363-369. 570689 0442.35064 10.1512/iumj.1980.29.29029 STREDULINSKY, E.W., Higher integrability from reverse Hölder inequalities. Indiana Univ. Math. J., 29, n. 3, 1980, n. 3, 407-413.
oai:bdim.eu:RLIN_2003_9_14_1_51_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_2003_9_14_1_51_0 Sulla flessione elastica delle travi in c.a. in presenza di fessurazione On the elastic flexure with cracking of reinforced concrete beams Como Mario 2003 3 14 RLIN_2003_9_14 9 1 RLIN_2003_9_14_1 51 68 2057274 1225.74049 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Viene formulata una teoria della flessione delle travi in cemento armato in presenza di fessurazione. Si esamina l’effetto del «tension stiffening» e, attraverso un processo di omogeneizzazione, si valuta la curvatura media tra le fessure. Si perviene così all’equazione differenziale della flessione elastica delle travi fessurate. Le applicazioni numeriche svolte vengono confrontate con le risultanze sperimentali.

A theory of the elastic flexure of reinforced concrete beams in presence of cracking is thoroughly developed. The mean curvature between the cracks is evaluated and the differential equation of the flexure of the reinforced concrete beams in presence of cracks is obtained. The various numerical applications show agreement with the test results.

Elastic flexure Reinforced concrete cracking Reinforced concrete beams provider bdim
AMERICAN CONCRETE INSTITUTE, Building Code Requirements for Reinforced Concrete. ACI Standard, 318-71, American Concrete Institute, Detroit 1971. PARK, R. - PAULAY, T., Reinforced Concrete Structures. J. Wiley, New York 1975. COMITÉ EURO-INTERNATIONAL DU BÉTON, CEB - Manual of Cracking and Deformation. Bull. n. 158 E; 1985. FAVRE, R. - BEEBY, A. W. - FALKNER, H. - KOPRNA, M. - SCHIESSL, P., Cracking and deformation. Comité Euro-International de Béton (CEB), Federal Institute of Technology, Lausanne (Switzerland) 1985. 1 e 2, Part 1 and 1.1, ENV 1991 e 1992. COSENZA, E. - GRECO, C., Il calcolo delle deformazioni nelle strutture in cemento armato. CUEN Edit., Napoli 1991. GHALI, A. - FAVRE, R., Concrete structures: stresses and deformations. E & FN Spon, 2nd ed., London 1994. DD.MM., Norme tecniche per il calcolo, l’esecuzione ed il collaudo delle strutture in cemento armato, normale e precompresso e per le strutture metalliche. G.U. n. 29, 5.2. 1996. ACI, Committee 435, Deflection of Reinforced Concrete Flexural Members. ACI Journal, v. 63, n. 6, 1996. TONIOLO, G., Tecnica delle costruzioni. Ed. Masson, Milano 1997. MALERBA, P.G., Analisi limite e non lineare di strutture in calcestruzzo armato. Collana di Ingegneria Strutturale n. 10, CISM, Udine 1998. BIGAJ, A.J., Bond behaviour of deformed bars in NSC and HSC, part I and II. Stevin Report, Delft University of Technology, 1999. GAMBAROVA, P.G. et al., Aderenza armatura-calcestruzzo e fessurazione longitudinale per barre di piccolo diametro. Studi e Ricerche, v. 14, Scuola di Specializzazione in c.a., Politecnico di Milano, 1997.
oai:bdim.eu:RLIN_1999_9_10_4_279_02021-11-02T15:25:00ZRLIN
RLIN Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei Matem. Appl. 1120-6330 Accademia Nazionale dei Lincei RLIN_1999_9_10_4_279_0 L’analisi matematica in Italia fra le due guerre Mathematical Analysis in Italy between the two world wars Fichera Gaetano 1999 12 10 RLIN_1999_9_10 9 4 RLIN_1999_9_10_4 279 312 1767935 1026.01013 MetaFull (PDF) MetaFull (XML) Access to full text Full (PDF) Full (DjVu)

Questo lavoro esamina i contributi scientifici portati dalla scuola italiana di Analisi matematica nella prima metà del 20° secolo.

This Memoir analyses the scientific contributions of the Italian school of Mathematical Analysis during the first half of the 20th century.

History of Mathematics Mathematical Analysis provider bdim
0061.24007 Amerio, L., Sull’integrazione dell’equazione \( \triangle_{2} u - \lambda^{2} u = f \) 2 u - λ 2 u = f in un dominio di connessione qualsiasi. Rend. Istituto Lombardo, 78, 1944-45, 1-24. 43.0453.03 Amoroso, L., Sopra un problema al contorno. Rend. Circolo Matematico di Palermo, XXXIII, 1912, 75-85. 38439 0040.19001 Bergman, S., The kernel function and conformal mapping. New York, N.Y. 1950. 54140 0053.39003 Bergman, S. - Schiffer, M., Kernel functions and elliptic differential equations in Mathematical Physics. New York, N.Y. 1953. 47.0936.01 Brillouin, M., La méthode des moindres carrés et les équations aux d´erivées partielles de la Physique mathématique. Annales de Physique, VI, 1916, 137-223. Caccioppoli, R., Opere. A cura dell’Unione Matematica Italiana, Roma 1963, 2 voll. 41.0487.01 Levi, E. E., Studi sui punti singolari essenziali delle funzioni analitiche di due o più variabili complesse. Annali di Matem. pura e appl., 17, 1910, 61-68. Fantappiè, L., Opere scelte. A cura dell’Unione Matematica Italiana, Bologna 1973, 2 voll. 36409 0066.09902 Fichera, G., Risultati concernenti la risoluzione delle equazioni funzionali lineari dovuti all’Istituto Nazionale per le Applicazioni del Calcolo. Atti Acc. Lincei Mem. fis., s. 7, III, sez. 1, 1950, 3-81. 0705.32006 Fichera, G., Unification of local and global existence theorems for holomorphic functions of several complex variables. Atti Acc. Lincei Mem. fis., s. 8, XVIII, fasc. 3, 1986, 61-83. 0258.35001 Kreith, K., Oscillation Theory. Lecture Notes in Mathematics, 324, Berlin-Heidelberg-New York 1973. Martinelli, E., Introduzione elementare alla teoria delle funzioni di variabili complesse con particolare riguardo alle rappresentazioni integrali. Contributi del Centro Linceo Interdisciplinare, 67, Accademia Nazionale dei Lincei, Roma 1984. 284700 0198.14101 Miranda, C., Partial differential equations of elliptic type. Berlin-Heidelberg-New York 1954 (I), 1969 (II). 45.0408.03 Nalli, P., Sulle serie di Fourier delle funzioni non assolutamente integrabili. Rend. Circolo Matematico Palermo, XL, 1915, 33-37. 47.0374.02 Nalli, P., Sulla rappresentazione di una funzione simmetrica \( K(s,t) \) K s , t e dell’espressione \( k(s) g(s) + \int_{a}^{b} K(s,t) g(t) dt \) k s g s + a b K s , t g t d t . Rend. Circolo Matematico Palermo, XLIII, 1919, 105-124. Oleinik, O. A. - Radkevič, E. V., Second order equations with nonnegative characteristic form. Providence, RI-New York-London 1973. 5359 0031.01204 66.0198.01 Picone, M., Appunti di Analisi superiore. Napoli 1940. 0033.17002 Radó, T., Length and Area. Amer. Math. Soc. Colloquium Publ., v. 30, Providence, RI 1948. 0002.34202 Severi, F., Risoluzione generale del problema di Dirichlet per le funzioni biarmoniche. Atti. Acc. Lincei Rend. fis., XIII, 1931, 795-804. 0121.25904 Smirnov, V. I., A course of higher mathematics. Oxford-London-Edinburgh-New York-Paris-Frankfurt 1964, vol. V. 49.0348.05 Tonelli, L., Fondamenti di Calcolo delle variazioni. Bologna 1921-1923, 2 voll. 49.0346.01 Tricomi, F., Sulle equazioni lineari alle derivate parziali del 2° ordine di tipo misto. Atti Acc. Lincei Mem. fis., s. 5, XIV, sez. 1, 1923, 133-247. 76936 0068.28005 Tricomi, F., Funzioni ipergeometriche confluenti. Roma 1954. 66852 0056.20001 Tricomi, F., Stranezze del "Tricomi gas". Atti Acc. Lincei, s. 8, XVI, 1957, 423-426. Volterra, V., Leçons sur les fonctions de lignes. Paris 1913. 100765 0086.10402 55.0814.01 Volterra, V., Theory of functionals and of integral and integro-differential equations. New York, N.Y. 1959. 3331 66.0444.01 Weyl, H., The method of orthogonal projection in potential theory. Duke Math. Journ., 7, 1940, 411-440. 52.0342.03 Wirtinger, W., Zur formalen Theorie der Funktionen von mehr complexen Veränderlichen. Mathem. Annalen, 97, 1926, 357-375.
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