Stanisław Mieczysław Mazur was a Polish mathematician and a member of the Polish Academy of Sciences.
Stanisław Mazur in 1966
Mazur awards a live goose to Per Enflo, who solved Mazur's 1936 problem in the Scottish book. The photograph comes from the book Pół wieku matematyki polskiej 1920-1970 ("Half a Century of Polish Mathematics 1920-1970").