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Zbl 1165.34400
Hu, Daowei; Zhang, Zhengqiu
Four positive periodic solutions of a discrete time delayed predator-prey system with nonmonotonic functional response and harvesting. (English)
[J] Comput. Math. Appl. 56, No. 12, 3015-3022 (2008). ISSN 0898-1221

Summary: 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.
MSC 2000:
*34K13 Periodic solutions of functional differential equations
92D25 Population dynamics

Keywords: four positive periodic solutions; predator-prey system; continuation theorem of coincidence degree theory; nonmonotonic functional response; harvesting

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