| 一个具时滞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： | 邓习军. 一个具时滞的三种群食物链系统正周期解的存在性[J]. 云南民族大学学报(自然科学版), 2006, 15(1): 15-18 |
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| 作者姓名： | 邓习军 |
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| 作者单位： | 昆明理工大学,理学院,云南,昆明,650093 |
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| 摘 要： | 利用重合度理论研究了一个具时滞的三种群食物链系统正周期解的存在性,建立了该系统存在正周期解的一个简明判据,所得结果大大改进了已有文献的相应结果.
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| 关 键 词： | 重合度 正周期解 食物链系统 |
| 文章编号： | 1672-8513(2006)01-0015-04 |
| 修稿时间： | 2005-09-22 |
Existence of Positive Periodic Solutions for Three-Species Food-Chain System with Delays |
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| Deng Xijun. Existence of Positive Periodic Solutions for Three-Species Food-Chain System with Delays[J]. Journal of Yunnan Nationalities University:Natural Sciences Edition, 2006, 15(1): 15-18 |
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| Authors: | Deng Xijun |
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| Abstract: | In this paper,by applying Mawhin's continuation theorem of coincidence degree,a set of easily verifiable criteria are established as the existence of positive periodic solutions for a three-species food-chain system with delays.Our results greatly improve the correponding result of some known papers. |
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| Keywords: | coincidence degree positive periodic solution food-chain system |
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