Ulam–Hyers–Rassias Stability for a Class of Fractional Integro-Differential Equations

By means of the recent $\psi$-Hilfer fractional derivative and of the Banach fixed-point theorem, we investigate stabilities of Ulam–Hyers, Ulam–Hyers–Rassias and semi-Ulam–Hyers–Rassias on closed intervals [a, b] and $[a,\infty )$ for a particular class of fractional integro-differential equations.