Education
He studied mathematics at the University of Vienna and obtained his doctorate in 1923, under the supervision of Philipp Furtwängler.
mathematician university professor
He studied mathematics at the University of Vienna and obtained his doctorate in 1923, under the supervision of Philipp Furtwängler.
He then moved to the University of Hamburg. Nielsen–Schreier theorem
Schreier refinement theorem
Artin–Schreier theorem
Schreier"s subgroup lemma
Schreier–Sims algorithm
Schreier coset graph
Schreier conjecture
Schreier domain.