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The Scientific World Journal - Volume 2014 2014, Article ID 512838, 7 pages -

Research Article

Department of Mathematics, Lvliang University, Lishi, Lvliang City, Shanxi 033001, China

Department of Mathematics, Shanxi University, Taiyuan, Shanxi 030006, China

Received 26 December 2013; Accepted 11 March 2014; Published 27 March 2014

Academic Editors: J. Fernández and D. Xu

Copyright © 2014 Qiaoqin Gao and Zhen Jin. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A predator-prey system was studied that has a discrete delay, stage-structure, and Beddington-DeAngelis functional response, where predator species has three stages, immature, mature, and old age stages. By using of Mawhin-s continuous theorem of coincidence degree theory, a sufficient condition is obtained for the existence of a positive periodic solution.

Autor: Qiaoqin Gao and Zhen Jin

Fuente: https://www.hindawi.com/


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