1906 – He was born on the 6th day of June in Krefeld, Germany; he was an algebraist, group theorist, and numerical analyst. He was also an avid guitar player.
1935 – He independently discovered Zorn’s lemma, a powerful tool in set theory that is applicable to a wide range of mathematical constructs such as vector spaces, ordered sets which was first discovered by Kuratowski in 1922.
1946 – He was a professor at Indiana University.
1993 – He died on the 9th day of March in Bloomington, Indiana, USA.