一类具有正负系数的脉冲时滞差分方程的振动性

Oscillation of A Class of Impulsive Delay Difference Equations with Positive and Negative Conditions

讨论了一类具有正负系数的咏冲时滞差分方程(?)解的振动性,给出了所有解振动的充分条件。

In this paper,the following impulsive delay difference equation with positive and negative Conditions is considered {△x（t）＋p（t）x（t-l）-q（tx）x（t-r）=0,t≥t0,t≠tk x（tk^＋-x（tk）=bkx（tk）,t=tk,k=1,2,… The sufficient conditions are obtained for oscillation of all solutions and some results in the literatures are improved.