利用不动点定理得到了脉冲奇异混合边值问题的上下解方法,并且利用此方法得到了负指数的脉冲Emden—Fowler方程奇异混合边值问题正解存在的充分必要条件.
In this paper, we first give the method of lower and upper solutions for the existence of positive solutions to a singular impulsive boundary value problem by means of the fixed point theorem, then obtain a necessary and sufficient condition for the existence of positive solution of Emden-Fowler singular impulsive boundary value problem by using the method of lower and upper solutions.