摘要
本文主要研究一类基于比率的非自治的三种群捕食与被捕食系统,通过使用重合度理论建立这类系统的正周期解的存在性结果。
This paper mainly studies a type of predator-prey sys- tem of three species with ratio-dependence, and establishes the existence of the positive periodic solution of this type of system through using coincidence degree theory.
出处
《科教文汇》
2015年第18期180-181,184,共3页
Journal of Science and Education
基金
重庆文理学院人才引进项目
关键词
捕食-被捕食系统
正周期解
重合度理论
predator-prey system
positive periodic solution
co-incidence degree theory
