The Existence Of Positive Solution And Only Positive Common Solution For A Kind Of Differential Equations

This paper mainly researches on the existence of special positive solutions of boundary value problems for a kind of third order differential equations and common solution of boundary value problems for the two second differential equations. This article is divided into three chapters:The first chapter outlines the problems of the historical background and the main results of the present stage, outlines the main work of this paper.Chapter II, by using Krasnosel’skii fixed point theorem, it mainly researches on the existence of special positive solutions of boundary value problems for a kind of third order differential equations.Chapter Ⅲ, by using fixed point theorem, it mainly researches on the existence of the only positive common solution of boundary value problems for the two second order differential equations and the third order differential equations...