摘要
研究了n阶中立型方程正解的存在性,在p(t)常号和变号的情况下,给出了(*)存在衰减正解的充分条件.特别,这些结果推广了文[2],[4-6]和[8—12]的有关结果.
The existence of positive solutions of nib order neutral differential equation is investigated. Some sufficient conditions are given for existence of positive solutions with asymptotic decay of (*) for the case of constant sign and nonconstant sign of coefficients. In particular the result obtained provides an extension of those in [2], [4]-[6] and [8-12].
出处
《纯粹数学与应用数学》
CSCD
1995年第2期53-62,共10页
Pure and Applied Mathematics
关键词
时滞方程
正解
存在性
中立型方程
衰减正解
neutral delay defferential equations
existence of positive solutions fixed point theorem