摘要
微分方程周期解的存在性问题,很早就受到重视。本文用拓扑度的方法研究一类三阶非线性方程周期的存在性。为方便起见,我们约定本文涉及到的函数都是连续的,对t是ω周期的;
In this paper We have obtained the existence theorems of periodic solutions to aclass of third order nonlinear ordinary differential equations. These theorems extended the re-sults of paper [1] and [2].
出处
《纯粹数学与应用数学》
CSCD
1992年第2期14-20,共7页
Pure and Applied Mathematics
