Advances in Difference Equations
Volume 2007 (2007), Article ID 13916, 16 pages
Periodic Solutions for Subquadratic Discrete Hamiltonian Systems
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.