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Multiple periodic solutions in delayed Gause-type ratio-dependent predator-prey systems with non-monotonic numerical responses. (English) Zbl 1145.34332
Summary: By using a continuation theorem based on coincidence degree theory, we establish easily verifiable criteria for the existence of multiple periodic solutions in delayed Gause-type ratio-dependent predator-prey systems with numerical responses. As corollaries, some applications are listed.
34C25Periodic solutions of ODE
92D25Population dynamics (general)
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