...mawhin连续定理 [gap=785]keywords：p-laplacian operator; multi-point boundary value problems; theory of coincidence degree ...
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Sufficient conditions for the existence of positive periodic solutions are established by applying the continuation theorem of coincidence degree theory.
将应用叠合度理论的延拓定理建立正周期解存在的充分条件。
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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