@article{Almaghamsi2025, 
author = {Lamya Almaghamsi and Aeshah Alghamdi and Abdeljabbar Ghanmi},
title = {Existence of solution for a Langevin equation involving the    ψ-Hilfer fractional derivative: A variational approach},
year = {2025},
journal = {AIMS Mathematics},
volume = {10},
number = {1},
pages = {534-550},
keywords = {variational methods, fractional calculus, Langevin equation, generalized Riemann Liouville operators},
url = {https://www.sciopen.com/article/10.3934/math.2025024},
doi = {10.3934/math.2025024},
abstract = {This study examines the existence of a solution for a nonvariational Langevin equation that involves the    ψ-Hilfer fractional derivative. More specifically, we apply the mountain pass theorem, and then an iterative approach to establish the existence of a solution for the problem.}
}