Frigyes Riesz
| Frigyes Riesz | |
|---|---|
 |
|
| Born | 22 January 1880 Győr, Austria-Hungary |
| Died | Error: Need valid death date (first date): year, month, day Budapest, Hungary |
| Residence | Hungary |
| Citizenship | Hungarian |
| Fields | Mathematics |
| Doctoral advisor | Gyula Vályi |
| Doctoral students | János Aczél Steven Gaal Tibor Radó Alfréd Rényi |
| Known for | functional analysis integral equations ergodic theory Riesz representation theorem Riesz–Fischer theorem Riesz space Hardy space Lp space Riesz's lemma Radon–Riesz property proximity space F. and M. Riesz theorem |
Frigyes Riesz (Hungarian: Riesz Frigyes, Hungarian pronunciation: [ˈriːs ˈfriɟɛʃ]; 22 January 1880 – 28 February 1956) was a Hungarian[1][2] mathematician who made fundamental contributions to functional analysis.
Life and career
He was born into a Jewish family in Győr, Kingdom of Hungary, Austria-Hungary and died in Budapest, Hungary. Between 1911 and 1919 he was a professor at the Franz Joseph University in Kolozsvár, Austria-Hungary. Then, he was the rector and a professor at the University of Szeged, as well as a member of the Hungarian Academy of Sciences.[3] He was the older brother of the mathematician Marcel Riesz.
Riesz did some of the fundamental work in developing functional analysis and his work has had a number of important applications in physics. He established the spectral theory for bounded symmetric operators in a form very much like that now regarded as standard.[1] He also made many contributions to other areas including ergodic theory and he gave an elementary proof of the mean ergodic theorem.
Riesz founded the Acta Scientiarum Mathematicarum journal together with Alfréd Haar.
He had an uncommon method of giving lectures: he entered the lecture hall with an assistant and a docent. The docent then began reading the proper passages from Riesz's handbook and the assistant inscribed the appropriate equations on the blackboard—while Riesz himself stood aside, nodding occasionally.[4]
Publications
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See also
- Denjoy–Riesz theorem
- Riesz representation theorem
- F. and M. Riesz theorem
- Proximity space
- Riesz-Fischer theorem
- Riesz space
- Radon-Riesz property
- Riesz's lemma
References
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- Frigyes Riesz at the Mathematics Genealogy Project
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- ↑ 1.0 1.1 Eberhard Zeidler: Nonlinear Functional Analysis and Its Applications: Linear monotone operators. Springer, 1990 [1]
- ↑ Calendar of Historical Events, Births, Holidays and Observances
- ↑ János Horváth: A Panorama of Hungarian Mathematics in the Twentieth Century, Volume 1, Springer, 2006 [2]
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- Pages with reference errors
- Age error
- Articles containing Hungarian-language text
- 1880 births
- 1956 deaths
- University of Szeged
- Hungarian mathematicians
- 19th-century mathematicians
- 20th-century mathematicians
- 20th-century Hungarian people
- Mathematical analysts
- Functional analysts
- Operator theorists
- People from Budapest
- Members of the Hungarian Academy of Sciences
- Burials at Kerepesi Cemetery
- Franz Joseph University faculty
- Rectors of the Franz Joseph University
