Ambrosetti, Antonio:
On the Number of Solutions of Some Semilinear Elliptic Problems
Bollettino dell'Unione Matematica Italiana Serie 9 4 (2011), fasc. n.3, p. 313-319, (English)
pdf (255 Kb), djvu (79 Kb). | MR 2906763 | Zbl 1235.35125
Sunto
We show that a class of semilinear boundary value problems possess exactly one positive solution and one negative solution.
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