这份报纸是调查由二竞争的种组成的一个生物系统的积极周期的解决方案。为一套给定的重要的率和起始的分发的模型的 nonnegative 答案的存在和唯一被对待,答案的有收缩力的性质探索了。把结果基于这些,为积极周期的轨道的全球存在的一些简单条件借助于角 asymptotic 被建立固定的点定理。
This paper is to investigate positive periodic solutions of a biological system composed of two competing species. The existence and uniqueness of nonnegative solutions to the model for a set of given vital rates and initial distribution are treated and the contractive property of the solutions explored. Based on these results, some simple conditions for the global existence of positive periodic orbits are established by means of Horn's asymptotic fixed point theorem.