Oscillation of a class of partial difference equations with unbounded delay

This paper is concerned with the partial difference equation where σ and τ : N → Z are nondecreasing, σ(n) and τ(n) are strictly less than n for n ε N, limn → ∞ σ(n) = limn → ∞ τ(n) = ∞, {am,n}, {bm,n}, and {pm,n} are three real double sequences. Some oscillation criteria for this equation are obtained.