具正负系数的二阶非线性变时滞差分方程的振动性定理

Oscillation Theorems of Second- order Nonlinear Variable Delay Difference Equations with Positive and Negative Coefficients

本文研究了一类具有正负系数的二阶非线性中立型变时滞差分方程的振动性,利用Riccati变换技术,通过引入二重序列H(n,s),获得了该类方程振动的一些新的准则.

This paper discussed the oscillation of a class of second-order nonlinear neutral variabledelay difference equations with positive and negative coefficients. Using the generalized Riccatitransformation and double sequence H （n, s） , some new oscillation criteria for the equations were obtained.