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一类带收获项的离散Lotka-Volterra合作系统的四个正周期解

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一类带收获项的离散Lotka-Volterra合作系统的四个正周期解 廖华英1, 周正21. 南昌师范学院数学与计算机科学系, 南昌 330032;
2. 厦门理工学院应用数学学院, 厦门 361024 Four Positive Periodic Solutions for a Discrete Lotka-Volterra Cooperative System with Harvesting Terms LIAO Huaying1, ZHOU Zheng21. Department of mathematics and computer science, Nanchang Normal University, Nanchang small 330032, China;
2. School of Applied Mathematics, Xiamen University of Technology, Xiamen 361024, China
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摘要本文研究了一类带收获项的非自治Lotka-Volterra合作差分系统周期解的存在性.以迭合度理论中的延拓定理为理论基础,通过分析变形、利用一些不等式估计技巧构造了四个有界开集,同时利用Brouwer度的同伦不变性我们计算了这四个有界开集中算子的Brouwer度不等于零,从而得到了该差分系统至少存在四个正周期解的充分且简要的条件.
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收稿日期: 2015-05-18
PACS:O175.7
引用本文:
廖华英, 周正. 一类带收获项的离散Lotka-Volterra合作系统的四个正周期解[J]. 应用数学学报, 2016, 39(3): 441-451. LIAO Huaying, ZHOU Zheng. Four Positive Periodic Solutions for a Discrete Lotka-Volterra Cooperative System with Harvesting Terms. Acta Mathematicae Applicatae Sinica, 2016, 39(3): 441-451.
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