摘要
研究了一类三次Kolmogorov捕食者-食饵种群差分系统正周期解的存在性,利用重合度理论中的连续性定理建立了存在正周期解的充分性依据,推广并改进了文献中的相关结果.
This paper studies the existence of positive solution for a Cubic Kolmogorov predator-prey difference system. The sufficient conditions of existence of positive periodic solution for the system is obtained by means of continuation theorem of coincidence degree. The paper generalizes and improves the result in the literature.
出处
《数学的实践与认识》
CSCD
北大核心
2009年第9期245-250,共6页
Mathematics in Practice and Theory
基金
国家自然科学基金(10571021)
关键词
正周期解
差分方程
重合度
positive solution
difference equations
coincidence degree
