摘要
研究具有可变时滞的高阶非自治中立型差分方程△^m(xn-cxn-k)+h(n,Xn-ln)=0(n=0,1,2,…)的振动性.利用Banach空间的压缩映象原理,得到了这类差分方程振动的必要条件,利用偏序集中的Knaster不动点定理,得到了这类方程振动的充分必要条件,同时得到了这类差分方程存在最终正解的准则。
This paper is concerned with the oscillation of high order neutral type delay difference equations Δ(xn -cxn-k)+ h(n, xn-ln) =0,n= 0,1,2,.... By the principle of contraction mapping in Banach space and the principle of Knaster fixed point in partial order set, the necessary and sufficient conditions of oscillation of these equations are obtained. At the same time, the existence criterion of eventually positive solutions of these equations is presented.
出处
《生物数学学报》
CSCD
北大核心
2006年第4期564-570,共7页
Journal of Biomathematics
基金
广州市科技计划项目2006j1-C0341资助
关键词
非自治
中立型差分方程
可变时滞
振动性
最终正解
Nonautonomous
Neutral difference equations
Variable delay
Oscillation
Eventually positive solutions