Stefan Banach — Polish Mathematician born on March 30, 1892, died on August 31, 1945
Stefan Banach was a Polish mathematician who is generally considered one of the world's most important and influential 20th-century mathematicians. He was one of the founders of modern functional analysis, and an original member of the Lwów School of Mathematics. His major work was the 1932 book, Théorie des opérations linéaires, the first monograph on the general theory of functional analysis... (wikipedia)