On Volterra functions and Ramanujan integrals

TL;DR

This paper reviews the properties and asymptotic behavior of Volterra functions, explores their connections with Ramanujan integrals, and discusses implications for numerical computation and applications.

Contribution

It provides a comprehensive framework for understanding Volterra functions' asymptotics and links them to Ramanujan integrals, enhancing theoretical and computational insights.

Findings

Collected key asymptotic results for Volterra functions.

Established connections between Volterra functions and Ramanujan integrals.

Discussed applications in numerical computation and analysis.

Abstract

Volterra functions were introduced at the beginning of the twentieth century as solutions of some integral equations of convolution type with logarithmic kernel. Since then, few authors have studied this family of functions and faced with the problem of providing a clear understanding of their asymptotic behaviour for small and large arguments. This paper reviews some of the most important results on Volterra functions and in particular collects, into a quite general framework, several results on their asymptotic expansions, these results turn out to be useful not only for the full understanding of the behaviour of the Volterra functions but also for their numerical computation. The connections with integrals of Ramanujan type, which have several important applications, are also discussed.