Sȩdziwy, Stanisław:
Periodic Solutions of Scalar Differential Equations without Uniqueness
Bollettino dell'Unione Matematica Italiana Serie 9 2 (2009), fasc. n.2, p. 445-448, (English)
pdf (84 Kb), djvu (50 Kb). | MR 2537280 | Zbl 1178.34045
Sunto
The note presents a simple proof of a result due to F. Obersnel and P. Omari on the existence of periodic solutions with an arbitrary period of the first order scalar differential equation, provided equation has an n-periodic solution with the minimal period n > 1.
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Con il contributo del Ministero per i Beni e le Attività Culturali