Periodic solutions of first order functi
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Dingyong Bai; Yuantong Xu
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Article
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2007
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Elsevier Science
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English
โ 183 KB
The paper is concerned with the functional differential equation where ฮป > 0, a(t), b(t), h 1 (t) and h 2 (t) are periodic functions. Applying Leggett-Williams fixed point theorem to the equation, we show the explicit open intervals of ฮป such that the equation has at least three nonnegative periodi