摘要
利用重合度理论中的延拓定理讨论了一个具有三个成长阶段的自食单种群时滞模型正周期解的存在性,得到了保证周期解存在的充分条件.
By using a continuation theorem based on Ganies and Mawhin＇s coincidence degree, the authors study the global existence of positive periodic solution for a single species model with three life stage structure, cannibalism and time delay. Also, the sufficient conditions of the positive periodic solution are obtained.
出处
《数学的实践与认识》
CSCD
北大核心
2011年第8期85-91,共7页
Mathematics in Practice and Theory
关键词
阶段结构
重合度
周期解
自食
时滞
stage structure
coincidence degree
periodic solution
cannibalism
time delay
