Discrete Dynamics in Nature and Society
Volume 2009 (2009), Article ID 760328, 9 pages
doi:10.1155/2009/760328
Periodic solutions for a system of difference equations
Shugui Kang1
and Bao Shi2
1College of Mathematics and Computer Science, Shanxi Datong University, Datong, Shanxi 037009, China
2Department of Basic Sciences, Naval Aeronautical Engineering Institute, Yantai, Shandong 264001, China
Abstract
This paper deals with the second-order nonlinear systems of difference equations, we obtain the existence theorems of periodic solutions. The theorems are proved by using critical point theory.