Positive solutions of three-point fractional sum boundary value problem for Caputo fractional difference equations via an argument with a shift

Abstract

In this paper, we study a new class of three-point boundary value problem of nonlinear Caputo fractional difference equation. Our problem contain an argument with a shift. The existence of at least one positive solution is proved by using the Guo-Krasnoselskii’s fixed point theorem. Some illustrative examples are given.