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 Go ogle Doodle Celebrates  Celebrating Stefan Banach Today's Google Doodle honors Stefan Banach, a founding member of the Lwów School of Mathematics and the father of contemporary functional analysis. On this day in 1922, a renowned twentieth-century mathematician was formally appointed as a professor. Stefan Banach was born in the Polish city of Kraków. He never met his mother, and his father abandoned him to be raised by a city family. Banach was ruled ineligible for military duty due to his poor eyesight and taught at local schools during World War I. Banach was hired at Lvov Technical University after releasing mathematical articles he worked on in his leisure time. He was a mathematician and professor who was mainly self-taught. Hugo Steinhaus, a well-known mathematician and educator, befriended a young Banach. Steinhaus, a pioneer in game and probability theory, subsequently referred to Banach as his "biggest scientific discovery." Banach established contemporary f...