Gottfried Köthe

Gottfried Köthe
Gottfried Köthe, Hagemann, Otto Toeplitz, 1930
Born	(1905-12-25)December 25, 1905 Graz
Died	April 30, 1989(1989-04-30) (aged 83) Frankfurt
Thesis	Beiträge zu Finslers Grundlegung der Mengenlehre (1927)
Doctoral advisors	Tonio Rella, Robert Daublewsky von Sterneck
Doctoral students	Norbert Adasch, Friedhorst Ballier, Gunter Bengel, Hilde Bünding, David Findley, Gunter Frank, Peter Gänßler, Bernhard Gramsch, Manfred Grathwohl, Rolf Grigorieff, Elisabeth Hagemann, Karl Hainer, Gil Henriques, Werner Hildenbrand, Ralf Hollstein, Shih-hua Hu, Takashi Ichinose, Rolf Kultze, Herbert Kupisch, Georg Lang, Jaime Lesmes, Jürgen Maetzke, Eitel-Eberhard Markwirth, Hans-Jürgen Moschke, Georgios Pantelidis, Rudolf Peter, Ulf Schlotterbeck, Carl-Heinz Scriba, Peter Spuhler, Tosun Terzioğlu, Wolfgang Uhl, Johann Walter, Dieter Wich, Joseph Wloka (), Jacobus Zaat

Gottfried Maria Hugo Köthe (born 25 December 1905 in Graz; died 30 April 1989 in Frankfurt) was an Austrian mathematician working in abstract algebra and functional analysis.

In 1923 Köthe enrolled in the University of Graz. He started studying chemistry, but switched to mathematics a year later after meeting the philosopher Alfred Kastil. In 1927 he submitted his thesis Beiträge zu Finslers Grundlegung der Mengenlehre ("Contributions to Finsler's foundations of set theory") and was awarded a doctorate. After spending a year in Zürich working with Paul Finsler, Köthe received a fellowship to visit the University of Göttingen, where he attended the lectures of Emmy Noether and Bartel van der Waerden on the emerging subject of abstract algebra. He began working in ring theory and in 1930 published the Köthe conjecture stating that a sum of two left nil ideals in an arbitrary ring is a nil ideal. By a recommendation of Emmy Noether, he was appointed an assistant of Otto Toeplitz in Bonn University in 1929–1930. During this time he began transition to functional analysis. He continued scientific collaboration with Toeplitz for several years afterward.

Köthe's Habilitationsschrift, Schiefkörper unendlichen Ranges über dem Zentrum ("Skew fields of infinite rank over the center"), was accepted in 1931. He became Privatdozent at University of Münster under Heinrich Behnke. During World War II he was involved in coding work. In 1946 he was appointed the director of the Mathematics Institute at the University of Mainz and he served as a dean (1948–1950) and a rector of the university (1954–1956). In 1957 he became the founding director of the Institute for Applied Mathematics at the University of Heidelberg and served as a rector of the university (1960–1961).