Mathematician:Ernst Witt

German mathematician working mainly in the field of quadratic forms and algebraic function fields.

Nationality
German

History

 * Born: 26 June 1911, Alsen (German Baltic island) (now Als, Denmark)
 * Died: 3 July 1991, Hamburg, Germany

Theorems and Definitions

 * Witt Algebra
 * Witt Decomposition
 * Witt Group
 * Hasse-Witt Matrix (with Helmut Hasse)
 * Witt Ring
 * Bourbaki-Witt Fixed Point Theorem (with Nicolas Bourbaki)
 * Poincaré-Birkhoff-Witt Theorem (with Henri Poincaré and George David Birkhoff)
 * Shirshov-Witt Theorem (with Anatoly Illarionovich Shirshov)
 * Witt's Theorem
 * Witt Vector

Books and Papers

 * 1933: Riemann-Rochscher Satz und Z-Funktion im Hyperkomplexen
 * 1937: Treue Darstellung Liescher Ringe
 * 1941: Spiegelungsgruppen und Aufzählung halbeinfacher Liescher Ringe
 * 1941: Eine Identität zwischen Modulformen zweiten Grades
 * 1950: On Zorn's Theorem
 * 1951: Intuitionistic mathematics