高阶非线性中立型微分方程的周期解

Periodic solutions of higher order nonlinear neutral differential equations

利用k-集压缩延拓理论 ,研究了一类高阶非线性中立型微分方程周期解的存在性 ,推广了文 [1 ],[2 ]的相应结果 .

In this paper,we study the existence of periodic so lutions for a class of higher order nonlinear neutral differential equations by using the method of the continuation theory for k-set contractions.The corresponding results in [1,2] are extended.