Advances in Difference Equations
Volume 2007 (2007), Article ID 42530, 9 pages
Existence of Periodic and Subharmonic Solutions for Second-Order -Laplacian Difference Equations
Department of Applied Mathematics, Faculty of Science, Kunming University of Science and Technology, Yunnan 650093, China
Received 26 December 2006; Accepted 13 February 2007
Academic Editor: Kanishka Perera
Copyright © 2007 Peng Chen and Hui Fang. 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 obtain a sufficient condition for the existence of periodic and subharmonic solutions of second-order -Laplacian difference equations using the critical point theory.