THE LOWER-UPPER SOLUTION METHOD OF INTEGRO-DIFFERENTIAL EQUATIONS ON INFINITE INTERVAL IN BANACH SACES
无限区间上的 Banach 空间积-微分方程的初值问题的上下解方法

We establish the comparison theorem of integro--differential equations on infinite interval, and, by applying the lower-upper solution method, prove the existence of extreme solutions for nonlinear first order integro-differential equations on infinite interval in Banach spaces.