School of Mathematics and Information Science, Guangzhou University, Guangzhou, Guangdong 510006, China
Academic Editor: Patricia J. Y. Wong
Copyright © 2009 Shenghuai Huang and Zhan Zhou. 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.
By using the critical point theory, we establish various sets of sufficient conditions on the nonexistence and existence of solutions for the boundary value problems of a class of fourth-order difference equations.