一类中立型方程的正解

On The Positive solutions of A Kind of Neutarl Equations

本文研究具有正负系数的中立型微分方程的发展历史与现状,并且得到了这类方程存在有界正解的一个充分条件。

In this paper we consider the neutral differential equations with positive and nega- tive coefficients,we will introduce the development and status quo of this equation and suffi- cient condition for the existence of positive solutions are obtained respectively.