离散时间的多种群互惠系统正周期解的存在性

Existence of Positive Periodic Solution for a Discrete Time of Many Species Cooperative System

利用重合度理论中的延拓定理研究了一类具有周期系数和离散时间的多种群差分互惠系统模型,得到了该系统正周期解存在的充分条件,推广并改进了相关结果.

The existence of positive periodic solution for a discrete time of many species cooperative model governed by difference equations with periodic coefficients is established by using the method of coincidence degree.Particularly,our results generalize and improve some previously known criteria.