具Holling Ⅲ型功能性反应食物链系统周期正解的存在性

Positive periodic solution of the food-chain system with Holling Ⅲ type functinal response

研究一类具有Holling型功能性反应的食物链系统,利用重合度理论,得到了保证系统周期正解存在的充分性条件.

We proposed a food-chain system with Holling type functional response. By applying the coincidence degree theorey, sufficient conditions which guarantee the existence of at least one positive periodic solution of the model are obtained.