摘要
运用Schauder不动点定理,得到了下述方程y'(t)=-a(t)y(t)+(ft,y(t-τ(t))),t∈R+正周期解存在的一个充分条件.在各种解法中,本方法是最简单的.
In this paper,by using Schauder fixed point theorem,we obtained a sufficient condition for the existence of positive periodic solutions to the following equation y'( t ) =-a( t ) y ( t ) + f( t,y ( t-τ ( t ) ) ), t ∈R^+.Among varied methods of solving,this method is the most simple.
出处
《邵阳学院学报(自然科学版)》
2009年第3期5-7,共3页
Journal of Shaoyang University:Natural Science Edition
关键词
时滞微分方程
正周期解
锥
SCHAUDER不动点定理
delay differential equation
positive periodic solution
cone
schauder fixed point thevrem