H. M. Srivastava

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...

On the ratio of gamma functions at rational arguments and its relation to Stirling numbers and discrete probability distribution

One of the most important special functions in mathematics, especially in number theory and mathematical analysis, having various applications, e.g. in such areas as probability theory, mathematical statistics, and physics, is Euler’s gamma function. The aim of this paper is two-...