具有正负系数的中立型时滞差分方程的振动准则

Oscillation in a Neutral Delay Difference Equation with Postive and Negative Coefficients

研究具有正负系数的中立型时滞差分方程 △(x_n-c_nx_(n-τ))+P_nX_n-σ-q_nX_(n-r)=0在允许C_n+sum from j=n-a+r to(n-1)qj≡1不成立的条件下,建立了方程(*)的振动性准则。

Consider the neutral delay difference equation with positive and negative coefficents One sufficient condition for the oscillation of Eq.(*) are ohstained when is not satisfied.