Discrete Dynamics in Nature and Society
Volume 2006 (2006), Article ID 58532, 15 pages

Existence criteria and classification schemes for positive solutions of second-order nonlinear difference systems

Wan-Tong Li,1 Can-Yun Huang,1 and Sui Sun Cheng2

1School of Mathematics and Statistics, Lanzhou University, Lanzhou, Gansu 730000, China
2Department of Mathematics, National Tsing Hua University, Hsinchu, Taiwan 30043, China

Received 1 May 2006; Accepted 19 July 2006

Copyright © 2006 Wan-Tong Li et al. 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.


Classification schemes for positive solutions of a class of second-order nonlinear difference systems are given in terms of their asymptotic magnitudes; and necessary as well as sufficient conditions for the existence of these solutions are also provided. Finally, some examples are given to illustrate the main results.