一类二阶非自治迭代微分方程的周期解

On the periodic solutions to a type of second order nonautonomous differential—iterative equations

本文利用Schauder 不动点定理,研究了一类二阶迭代泛函微分方程x″(t)= a(t)f(x〈n〉(t))满足所给条件周期解的存在性。

The existence of periodic solutions to a type of second order nonautonomous differential—iterative equation X″(t)=a(t)(x〈n〉(t))are given by using Schauder fixed point theorem.