Frequent oscillatory criteria for partial difference equations with several delays

摘要

This paper is concerned with partial difference equations with several delays of the form[GRAPHICS]where a, b, and d are three positive real constants, sigma(i), tau(i), and r are positive integers, and {p(i) (m, n)} are real double sequences, i = 1, 2,..., r. Some new frequent oscillation criteria for this equation are derived. (C) 2004 Elsevier Ltd. All rights reserved.