高阶非线性中立型泛函微分方程的周期解

摘要

In this paper, some higher nonlinear neutral delay functional differential equations are dis- cussed on the coincidence degree theory. A sufficient condition for the existence of periodic solution of these equation is given, which generalizes the known result.%利用重合度理论,研究一类高阶非线性中立型泛函微分方程的周期解的存在性,给出这一类方程存在周期解的充分性条件,推广了已有的结果.