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Abstract
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International Journal of Mathematics and Mathematical Sciences
Volume 2006 (2006), Issue 15, Article ID 38617, 16 pages
doi:10.1155/IJMMS/2006/38617

Existence of positive periodic solution of a periodic cooperative model with delays and impulses

Yongkun Li and Wenya Xing

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

Abstract

Sufficient conditions are obtained for the existence of at least one positive periodic solution of a periodic cooperative model with delays and impulses by using Mawhin's continuation theorem of coincidence degree theory.