比率型3种群混合模型正周期解的存在性  

The existence of positive periodic solutions for mixed models of three populations of ratio type

作　　者：吴新民 WU Xinmin(School of Science,Shaoyang University,Shaoyang 422000,China)

机构地区：[1]邵阳学院理学院,湖南邵阳422000

出　　处：《邵阳学院学报（自然科学版）》2020年第4期1-7,共7页Journal of Shaoyang University：Natural Science Edition

基　　金：湖南省教育厅重点科研项目(09A082);湖南省自然科学基金项目(12JJ3008)。

摘　　要：利用重合度理论的延拓定理,研究了更一般的比率型3种群混合模型,导出了其正周期解的存在性准则。By using the continuation theorem of coincidence degree theory,a more general three kinds of mixed population model of rate type was studied,and the existence criterion of its positive periodic solution was derived.

关 键 词：比率型捕食系统 周期解 拓扑度理论 

分 类 号：O175.12[理学—数学]