一类一阶泛函微分方程正解的存在性

Existence of Positive Solution for A Class One Order Differential Equations

给出了一阶泛函微分方程 dx/dt+m∑i=1fi(t,x(gil(t)),…,x(gin(t)))=0存在正解的两个充分条件.

Consider the one order differential equation d x d t+∑mi=1f i(t,x(g i1 (t)))...,x(g in (t)))=0 , sufficient conditions are obtained for existence of positive solution of equation.