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中立型时滞种群对数模型的正周期解 被引量:2

Positive periodic solution for delay neutral population
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摘要 通过更精确的先验估计,利用重合度理论中的连续定理,研究了一类时滞种群模型的周期解,获得了这类模型存在正周期解的充分条件,所得结果推广了文[1]中的有关结论,并使条件有所减弱. Using better prior estimate, the theory of Brouwer degree and coincidence degree, the existence of positive periodic solution of a kind of neutral population model is studied. Some sufficient conditions are obtained,which is improvement of the theorem in the reference [1].
出处 《广西大学学报(自然科学版)》 CAS CSCD 2005年第3期238-241,共4页 Journal of Guangxi University(Natural Science Edition)
基金 国家科技部973项目(1999064911)
关键词 时滞种群模型 正周期解 重合度 delays neutral population model positive periodic solution toplogical degree
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