期刊
APPLIED MATHEMATICS AND COMPUTATION
卷 167, 期 1, 页码 324-344出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.amc.2004.06.082
关键词
n-species food-chain systems; positive periodic solution; holling type functional response; coincidence degree theory
Discrete periodic n-species food-chain systems with Holling types II and III functional responses and time delays are investigated, respectively. By using Gaines and Mawhin's continuation theorem of coincidence degree theory sufficient conditions are obtained for the existence of positive periodic solutions of the systems. (c) 2004 Elsevier Inc. All rights reserved.
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