# Mathematician:Max August Zorn

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## Mathematician

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)

Results named for **Max August Zorn** can be found here.

## Publications

- 1935:
*A remark on method in transfinite algebra*(*Bull. Amer. Math. Soc.***Vol. 41**: pp. 667 – 670) (in which Zorn's Lemma is presented) - 1941:
*Alternative rings and related questions I: existence of the radical* - 1944:
*Idempotency of infinite cardinals* - 1945:
*Characterization of analytic functions in Banach space*