Periodic solutions of first order functi
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John R. Graef; Lingju Kong
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Article
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2011
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Elsevier Science
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English
β 215 KB
We study the existence of T -periodic solutions of some first order functional differential equations. Several existence criteria are established for our problems; in particular, we obtain conditions for the existence of multiple (even infinitely many) T -periodic solutions of one of the problems. E