Fourth Order Two Point Boundary Value Problem,

This paper is devoted to investigate positive solutions of the fourth-order two-point boundary value problems. This class of problems is used to describe elastic deform ation of the beam. The following boundary value problems with the elastic beam are investigated including :both ends are simply supported, one end is fixed and the other end is free, and both ends are both hxed.the other ezld 15 free,and both ends are both hxed.