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The existence of positive periodic solutions for a periodic Volterra equation with several finite delays and an infinite delay is established. Sufficient conditions for the periodic solutions having global attractivity are obtained. 相似文献
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A general periodic Lotka-Volterra difference system is studied in this paper. A set of easily verifiable sufficient conditions that guarantee the existence of the positive periodic solutions is obtained. 相似文献
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In this paper, we give a counterexample to the article "Globally asymptotic stability of a recurrence sequence", Ann. of Diff. Eqs., 17:1(2001), 82-85. 相似文献
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