using coincidence degree theory
Using coincidence degree theory,sufficient conditions are obtained that ensure the existence of multiple positive periodic solutions for a discrete general predator-prey system.
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using coincidence degree theory
利用重合度理论
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Sufficient conditions are obtained for the global existence of a positive periodic solution of periodic neutral delay predator-prey system by using the method of coincidence degree theory.
利用重合度理论建立了一类周期中立型时滞捕食者-食饵系统正周期解的全局存在性的充分条件。
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