Mathematician:Max August Zorn

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

Best known for Zorn's Lemma, which he discovered in 1935. This is also known as the Kuratowski-Zorn Lemma, thereby acknowledging the work of Kazimierz Kuratowski who had published a version of 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

 * 1941: Alternative rings and related questions I: existence of the radical
 * 1944: Idempotency of infinite cardinals
 * 1945: Characterization of analytic functions in Banach space
 * 1945: Characterization of analytic functions in Banach space