Thongchai DumrongpokaphanNichaphat PatanarapeelertThanin Sitthiwirattham2025-03-102025-03-102020Advances in Difference Equations1687183910.1186/s13662-020-02756-02-s2.0-85086599191https://repository.dusit.ac.th//handle/123456789/4748In this paper, we aim to study a nonlocal Robin boundary value problem for fractional sequential fractional Hahn-q-equation. The existence and uniqueness results for this problem are revealed by using the Banach fixed point theorem. In addition, the existence of at least one solution is studied by using SchauderÕs fixed point theorem. The theorems for existence results are obtained. © 2020, The Author(s).All Open Access; Gold Open AccessExistenceFractional Hahn calculusFractional q-calculusRobin boundary value problemsArticleScopus