摘要
本文运用拓扑度理论中的重合度方法,得到了一类具投放或收获的单种群模型正周期解的存在性条件.文中的条件简洁而易验证.
By the methods of coincidence degree, the existence of positive periodic solution for a single-species model with stocking or harvesting is established in this paper.The conditions are concise and easily verified.
出处
《邵阳学院学报（自然科学版）》
2007年第3期14-16,共3页
Journal of Shaoyang University：Natural Science Edition
关键词
正周期解
拓扑度
投放或收获
positive periodic solufion
toplogic degree
stocking or harvesting
