Donal O’Regan

A generalized Z-number approach to solvability, best approximation, and Ulam–Hyers–Rassias stability of Ψ-Hilfer fractional differential equations

This paper investigates the solvability, best approximation, and Ulam–Hyers–Rassias stability of a class of Ψ-Hilfer fractional Hammerstein integro-differential equations in a generalized Z-number setting. The generalized Z-number framework is used to describe uncertainty togethe...