摘要
采用更精确的先验估计,利用拓扑度讨论了一类具有多滞量的周期扰动非线性系统的T-周期解,得到了系统存在T-周期解的充分条件.证明了具有滞后的单种群对数模型在一定条件下存在的正周期解.
The existence of periodic solution to nonlinear system with multiple delays is studied.Using topological degree and better prior estimate,sufficient conditions are obtained for the existence of T-periodic solutions.The positive periodic solution for a logarithmic population model is found under some conditions.
出处
《长沙电力学院学报（自然科学版）》
2004年第4期15-17,共3页
JOurnal of Changsha University of electric Power:Natural Science
关键词
多滞量
周期解
拓扑度
multiple delays
periodic solution
topological degree
