The Problem of Existence of Positive Periodic Solutions to a Neutral Model of Singal-species Population Growth
中立型单种群模型周期正解存在性问题

Keywords: Positive periodic solution,Abstract continuous,theorem,Neutral functional differential equation,k-set contractive operator
司期正解,抽象连续定理,中立型泛函微分方程,k-集压缩算子

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Abstract:

利用抽象连续的k-集压缩原理研究一类中立型单种群模型dt/dN=N(t)a(t)-β(t)N(t)-b(t)N(t-σ(t))-c(t)N'(t-τ(t))]周期正解的存在性问题，得到了周期正解存在性的若干结论，改进和推广了已有的工作.

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