Steinitz was born in Laurahütte (Siemianowice Śląskie), Silesia, Germany (now in Poland), the son of Sigismund Steinitz, a Jewish coal merchant, and his wife Auguste Cohen; he had two brothers. He studied at the University of Breslau and the University of Berlin, receiving his Ph.D. from Breslau in 1894. Subsequently, he took positions at Charlottenberg (now the Technical University of Berlin), Breslau, and the University of Kiel, Germany, where he died in 1928. Steinitz married Martha Steinitz and had one son.
Steinitz's 1894 thesis was on the subject of projective configurations; it contained the result that any abstract description of an incidence structure of three lines per point and three points per line could be realized as a configuration of straight lines in the Euclidean plane with the possible exception of one of the lines. His thesis also contains the proof of König's theorem for regular bipartite graphs, phrased in the language of configurations. In 1910 Steinitz published the very influential paper Algebraische Theorie der Körper (German: Algebraic Theory of Fields, Crelle's Journal (1910), 167–309). In this paper he axiomatically studies the properties of fields and defines important concepts like prime field, perfect field and the transcendence degree of a field extension. Steinitz proved that every field has an algebraic closure. He also made fundamental contributions to the theory of polyhedra: Steinitz's theorem for polyhedra is that the 1-skeletons of convex polyhedra are exactly the 3-connected planar graphs. His work in this area was published posthumously as a 1934 book, Vorlesungen über die Theorie der Polyeder unter Einschluss der Elemente der Topologie, by Hans Rademacher.
- O'Connor, John J.; Robertson, Edmund F., "Ernst Steinitz", MacTutor History of Mathematics archive, University of St Andrews.
- Ernst Steinitz at the Mathematics Genealogy Project
- Gropp, Harald, F.W. Levi (1888–1966) and E. Steinitz (1871–1928), Posters shown at 1998 International Congress of Mathematicians, Berlin, and again at the 6th Slovenian International Conference on Graph Theory, Bled'07.
- Röhl, H. (1962), Ernst Steinitz, eine Darstellung seines mathematischen Werkes, Staatsexamenarbeit Keil. As cited by Gropp.
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