Four positive periodic solutions of a discrete time delayed predator-prey system with nonmonotonic functional response and harvesting

Authors:
Daowei Hu;Zhengqiu Zhang
Affiliations:
College of Mathematics and Econometrics, Hunan University, Changsha, 410082, PR China;College of Mathematics and Econometrics, Hunan University, Changsha, 410082, PR China
Venue:
Computers & Mathematics with Applications
Year:
2008

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Global attractivity of a periodic ecological model with m-predators and n-preys by “Pure-delay type” system

Computers & Mathematics with Applications

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Abstract

In this paper, by employing the continuation theorem of coincidence degree theory, we establish an easily verifiable criteria for the existence of at least four positive periodic solutions for a discrete time delayed predator-prey system with nonmonotonic functional response and harvesting.