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具有捕获项的四种群周期捕食系统的多个正周期解存在性

Multiple positive periodic solutions for four-species predator-prey systems with harvesting terms
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摘要 讨论了一类具有捕获功能的4种群周期捕食系统周期解的存在性,利用重合度理论,我们得到了4种群周期捕食系统存在16个正周期解的主要结论,并举例说明我们所得结论的有效性. A four-species periodic predator-prey systems with harvesting terms is studied in this paper,by means of coincidence degree theory,sixteen positive periodic solutions for the predator-prey systems with harvesting terms are obtained.An example is given to illustrate the effectiveness of our results.
出处 《商丘师范学院学报》 CAS 2010年第12期1-9,共9页 Journal of Shangqiu Normal University
基金 国家自然科学基金资助项目(10726062) 福建省自然科学基金资助项目(2007J0180) 福州大学科技发展基金资助项目(2007-XQ-18)
关键词 捕食系统 重合度 周期解 存在性 predator-prey systems coincidence degree theory positive periodic solutions harvesting terms
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