Mathematician:Max August Zorn

German-born American mathematician who worked in algebra, set theory and numerical analysis.

Best known for Zorn's Lemma, also known as the Kuratowski-Zorn Lemma, which he discovered in 1935, independently of Kazimierz Kuratowski who had discovered it in 1922.

Nationality
German-born American

History

 * Born: June 6, 1906 in Krefeld, Germany
 * Died: March 9, 1993 in Bloomington, Indiana, United States

Theorems and Definitions

 * Artin-Zorn Theorem (with Emil Artin)
 * Zorn's Lemma (also known as Kuratowski-Zorn Lemma (independently of Kazimierz Kuratowski)

Books and Papers

 * 1935: A remark on method in transfinite algebra (in which what is now known as Zorn's Lemma first appears)
 * 1941: Alternative rings and related questions I: existence of the radical
 * 1944: Idempotency of infinite cardinals
 * 1945: Characterization of analytic functions in Banach space