Marek Kuczma

Marek Kuczma was a Polish mathematician specializing in functional equations, recognized as the founder of the Polish school of functional equations. He graduated from Jagiellonian University in 1956, earned his doctorate in 1961, habilitated in 1963, and became a professor in 1969, authoring three influential monographs and over 160 scientific articles.[1][2][4]

Katowice, Poland Oct 10, 1935 Wikipedia
Mathematics Functional Equations