Mathematician:Otto Schreier

Austrian mathematician who made great advances in group theory before dying unfortunately young of sepsis.

Nationality
Austrian

History

 * Born: 3 March 1901, Vienna, Austria
 * Died: 2 June 1929, Hamburg, Germany

Theorems and Definitions

 * Nielsen-Schreier Theorem
 * Schreier Refinement Theorem
 * Artin-Schreier Theorem
 * Schreier's Subgroup Lemma
 * Schreier-Sims Algorithm (with Charles Coffin Sims)
 * Schreier Coset Graph
 * Schreier Conjecture

Books and Papers

 * 1923: Über die Erweiterung von Gruppen (On the extension of groups)
 * 1926: Die Untergruppen der freien Gruppe (The subgroups of free groups)