About the scientific activities of Oleg Igorevich Marichev: to the 80th anniversary

S. V. Rogozin^a, S. M. Sitnik^bc, E. L. Shishkina<sup>bd

a</sup> Belarusian State University, Minsk, Belarus
^b Belgorod State National Research University, Belgorod, Russia
^c National Research Moscow State University of Civil Engineering, Moscow, Russia
^d Voronezh State University, Voronezh, Russia

Abstract: This article presents a detailed biography and analysis of the scientific contributions of the outstanding mathematician Oleg Igorevich Marichev (born 1945). It covers his journey from his school years in Minsk, where he developed an interest in mathematics, through his studies at Belarusian State University under the supervision of Academician F.D. Gakhov, to his fundamental works in the field of special functions and integral equations. The article describes in detail the creation of monumental reference books on integrals and series, as well as a key monograph on fractional calculus. Particular attention is paid to Marichev's work at Wolfram Research, where he developed symbolic integration algorithms and created the world's largest collection of mathematical formulas (the Wolfram Functions Site). The article highlights Marichev's innovative approach to unifying mathematical functions through Meyer G-functions and his significant role in the development of computer algebra.

Keywords: Marichev, Wolfram Mathematica, integral calculus, special functions, symbolic calculus.

Received: 03.09.2025
Revised: 24.09.2025

DOI: 10.47475/2500-0101-2025-10-4-609-633