Advances in Difference Equations
Volume 2010 (2010), Article ID 606149, 15 pages
doi:10.1155/2010/606149
Research Article

Frequent Oscillatory Behavior of Delay Partial Difference Equations with Positive and Negative Coefficients

Li Hua Xu1 and Jun Yang1,2

1College of Science, Yanshan University, Qinhuangdao, Hebei 066004, China
2Mathematics Research Center in Hebei Province, Shijiazhuang 050000, China

Received 12 November 2009; Accepted 11 February 2010

Academic Editor: Binggen Zhang

Copyright © 2010 Li Hua Xu and Jun Yang. 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.

Abstract

This paper is concerned with a class of nonlinear delay partial difference equations with positive and negative coefficients, which also contains forcing terms. By making use of frequency measures, some new oscillatory criteria are established.