Hans Hahn (mathematician)
| Hans Hahn | |
|---|---|
Hans Hahn (about 1905)
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| Born |
27 September 1879 Vienna, Austria-Hungary |
| Died | 24 July 1934 (aged 54) Vienna, Austria |
| Residence | Austria |
| Nationality | Austrian |
| Fields |
Mathematician Philosopher |
| Institutions |
University of Vienna Chernivtsi University University of Bonn |
| Alma mater | University of Vienna |
| Doctoral advisor | Gustav Ritter von Escherich |
| Doctoral students |
Karl Menger Witold Hurewicz Kurt Gödel |
| Known for |
Hahn–Banach theorem Hahn series |
Hans Hahn (German: [haːn]; 27 September 1879 – 24 July 1934) was an Austrian mathematician who made contributions to functional analysis, topology, set theory, the calculus of variations, real analysis, and order theory.
Born at Vienna as the son of a higher government official of the k.k. Telegraphen-Korrespondenz-Bureau (since 1946 named "Austria Presse Agentur"), in 1898 Hahn became a student at the Universität Wien starting with a study of law. In 1899 he switched over to mathematics and spent some time at the universities of Strasbourg, Munich and Göttingen. In 1902 he took his Ph.D. in Vienna, on the subject "Zur Theorie der zweiten Variation einfacher Integrale". His was a student of Gustav von Escherich.
He was appointed to the teaching staff (Habilitation) in Vienna in 1905. After 1905/1906 as a stand-in for Otto Stolz at Innsbruck and some further years as a Privatdozent in Vienna, he was nominated in 1909 Professor extraordinarius in Czernowitz, at that time a town within the empire of Austria. After joining the Austrian army in 1915, he was badly wounded in 1916 and became again Professor extraordinarius, now in Bonn. In 1917 he was nominated a regular Professor there and in 1921 he returned to Vienna with this title, where he stayed until his rather early death in 1934 at the age of 54, following cancer surgery. He had married Eleonore ("Lilly") Minor in 1909 and they had a daughter, Nora (born 1910).
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