Advances in Difference Equations
Volume 2007 (2007), Article ID 13916, 16 pages
Research Article

Periodic Solutions for Subquadratic Discrete Hamiltonian Systems

Xiaoqing Deng1,2

1College of Mathematics and Econometrics, Hunan University, Changsha 410082, China
2Department of Information, Hunan Business College, Changsha 410205, China

Received 4 February 2007; Accepted 26 April 2007

Academic Editor: Ondrej Dosly

Copyright © 2007 Xiaoqing Deng. 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.


Some existence conditions of periodic solutions are obtained for a class of nonautono mous subquadratic first-order discrete Hamiltonian systems by the minimax methods in the critical point theory.