| 具有脉冲效应的三种群食物链系统正周期解的存在性 |
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| 引用本文： | 夏正喜,张小芝. 具有脉冲效应的三种群食物链系统正周期解的存在性[J]. 数学的实践与认识, 2010, 40(23) |
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| 作者姓名： | 夏正喜 张小芝 |
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| 摘 要： | 利用重合度理论中的连续定理,研究了一类在周期环境中具有脉冲效应的三种群食物链系统,得到了其正周期解存在的充分条件.
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| 关 键 词： | 重合度 正周期解 食物链系统 |
Existence of Positive Periodic Solutions for the Food Chain System of Three Species with Impulsive Effect |
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| XIA Zheng-xi,ZHANG Xiao-zhi. Existence of Positive Periodic Solutions for the Food Chain System of Three Species with Impulsive Effect[J]. Mathematics in Practice and Theory, 2010, 40(23) |
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| Authors: | XIA Zheng-xi ZHANG Xiao-zhi |
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| Abstract: | By using the continuation theorem of coincidence degree theory,a food chain system of three species with inpulsive effect in a periodic environment is considered,a sufficient condition about the existence of positive periodic solutions is obtained. |
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| Keywords: | coincidence degree positive periodic solutions food chain system |
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