Oscillation for a High Order Nonlinear Difference Equations

摘要

In this paper, we consider certain nonlinear difference equations Δ2(|Δ2yn|α-1Δ2yn) + qn|yτ(n)|β-1yτ(n) = 0 , where (a) α, β are positive constants; (b) {qn}n0∞ are positive real sequences.n0∈N0 = {1,2…}. Oscillation and nonoscillation theorems of the above equation is obtained.