School of Mathematics and Computer Science, Fujian Normal University, Fuzhou, Fujian 350007, China
Copyright © 2010 Xuepeng Li and Wensheng Yang. 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.
We propose a discrete model of mutualism with infinite deviating arguments, that is . By some Lemmas, sufficient conditions are obtained for the permanence of the system.