摘要
考虑正负系数中立型时滞差分方程△( xn+ 1 - pnxn) + qnxn- k1 - rnxn- k2 = 0 ,获得了该方程存在有界正解的充要条件.
The neutral delay difference equation with positive and negative coefficients △(x n+1 -p nx n)+q nx n-k 1 -r nx n-k 2 =0 is discussed.Sufficient and necessary condition are obtained for the equation with a bounded positive solution.
基金
国家自然科学基金!(19671027)
关键词
正负系数
中立型
时滞差分方程
正解
Positive and negative coefficients Neutral delay difference equation Positive solution