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Periodic solutions of a predator-prey model with two delays. (Chinese. English summary) Zbl 1240.34413

Summary: A food chain system with ratio-dependent Holling II functional response and two periodic delays is studied. Using the coincidence degree theory, the existence of periodic solutions for this model is obtained under suitable conditions.

MSC:

34K60 Qualitative investigation and simulation of models involving functional-differential equations
34K13 Periodic solutions to functional-differential equations
47N20 Applications of operator theory to differential and integral equations
92D40 Ecology
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