Document Type: Research Paper
Department of Mathematics, University 8 May 1945 Guelma, Algeria
In this paper we will study the existence, uniqueness and positivity of solution of a boundary value prob-
lem for nonlinear fractional differential equation, by using Leray-Schauder nonlinear alternative, Banach
contraction and Guo-Krasnosel'skii xed point theorems.