Stanisław Mazur
![Stanisław Mazur in 1966](https://upload.wikimedia.org/wikipedia/commons/2/2b/Stanislaw_Mazur_Polish_mathematician.jpg)
Mazur made important contributions to geometrical methods in linear and nonlinear functional analysis and to the study of Banach algebras. He was also interested in summability theory, infinite games and computable functions. Provided by Wikipedia