摘要
考察了具有分布时滞的二阶泛函微分方程,利用重合度理论研究其周期解的存在性,得到了该方程周期解存在的充分条件,所得结果推广和改进了相关文献的结果.
In this paper,the existence of periodic solutions for second-order functional differential equations with distributed delays is investigated by applying Mawhin＇ s coincidence degree theory,and some sufficient criteria are established, which improve some known results.
出处
《哈尔滨商业大学学报（自然科学版）》
CAS
2009年第1期117-119,共3页
Journal of Harbin University of Commerce：Natural Sciences Edition
基金
黑龙江省教育厅科研项目(10553027)
关键词
二阶泛函微分方程
分布时滞
周期解
重合度
second-order functional differential equations
distributed delays
periodic solutions
coincidence degree
