摘要
应用锥上不动点理论讨论了一类包含许多时滞人口模型的泛函微分方程的正周期解的存在性.
In this paper, the existence of positive periodic solutions, for the neutral differential equation ( x (t) - px ( t - r (t) ) )' = a (t) ( x (t) - px ( t - r ( t ) ) ) - λh ( t ) f( x (t), x ( t - δ (t) ) ) were studied, several sufficient conditions were obtained by a fixed point theorem on cones of Banach spaces
出处
《怀化学院学报》
2007年第5期1-4,共4页
Journal of Huaihua University
关键词
中立型泛函微分方程
正周期解
存在性
时滞
neutral differential equation
positive periodic solutions
existence
delays