摘要
利用Mawhin的重合度理论,研究了二阶非线性泛函微分方程周期解的存在性.
We study the existence of periodic solutions of second order nonlinear functional differential equations by using the eonineidenee degree theory due to Mawhin.
出处
《数学理论与应用》
2006年第4期68-71,共4页
Mathematical Theory and Applications
关键词
重合度
非线性泛函微分方程
周期解
Coincidence degree Nonlinear functional differential equation Periodic solution
