一类时滞微分方程有非负解的研究

摘要

本文给出了一类时滞微分方程解为正解的充分条件,为了应用方便,还研究了在比较简单条件下有正解的情况,并说明了时滞对方程解的非负性的影响。%This paper gives some sufficient conditions which guarantee the solution of delay differential equations to be positive,In order to apply conveniently,We also study the positive solution under some simple sufficient conditions,and explain the influence of the time delay to the nonnegativity of the solution.