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Abstract
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International Journal of Mathematics and Mathematical Sciences
Volume 2005 (2005), Issue 4, Pages 499-506
doi:10.1155/IJMMS.2005.499

Positive periodic solutions of a discrete mutualism model with time delays

Yongkun Li

Department of Mathematics, Yunnan University, Kunming 650091, Yunnan, China

Abstract

A discrete periodic mutualism model with time delays is investigated. By using Gaines and Mawhin's continuation theorem of coincidence degree theory, the existence of positive periodic solutions of the model is established.