摘要
利用重合度理论和更精确的先验估计,讨论了一类二阶中立型泛函微分方程周期解的存在性问题;在更弱的条件下获得该方程周期解存在性的若干新结果,推广和改进了已有文献中的相关结论。
By means of better prior estimate and the coincidence degree theory, the existence of periodic solutions for a kind of second-order neutral functional differential equation is studied. Some new sufficient condition of periodic solutions is obtained on the even more conditions. The results have extend and improved the related reports in the literatures.
出处
《科学技术与工程》
2007年第11期2467-2471,共5页
Science Technology and Engineering
关键词
二阶中立型泛函微分方程
周期解
存在性
重合度理论
second-order Neutral functional differential equation periodic solution existence coincidence degree theory
