Saowaluck ChasreechaiThanin Sitthiwirattham2025-03-102025-03-102018Journal of Nonlinear Functional Analysis2052532X10.23952/jnfa.2018.152-s2.0-85046809437https://repository.dusit.ac.th//handle/123456789/4905In this article, we study existence results for Riemann-Liouville fractional sum-difference equations with a nonlocal fractional difference and fractional sum boundary value conditions based on the Sadovskii�s fixed point theorem. The investigated equations contain different orders of fractional differences and fractional sums. Finally, we present some examples to show the importance of these results. � 2018 Journal of Nonlinear Functional Analysis.All Open Access; Bronze Open AccessBoundary value problemExistenceFixed point theoremFractional sum-difference equationArticleScopus