Positive periodic solutions of discrete n-species food-chain systems
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摘要
Discrete periodic n-species food-chain systems with Holling types II and III functional responses and time delays are investigated, respectively. By using Gaines and Mawhin’s continuation theorem of coincidence degree theory sufficient conditions are obtained for the existence of positive periodic solutions of the systems.
论文关键词：n-Species food-chain systems,Positive periodic solution,Holling type functional response,Coincidence degree theory
论文评审过程：Available online 3 September 2004.
论文官网地址：https://doi.org/10.1016/j.amc.2004.06.082
