Citizenship Hungarian Name Frigyes Riesz Residence Hungary Books Functional analysis | Doctoral advisor Gyula Valyi Role Mathematician Fields Mathematics Siblings Marcel Riesz | |
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Born 22 January 1880
Gyor, Austria-Hungary ( 1880-01-22 ) Doctoral students Janos Aczel
Steven Gaal
Tibor Rado
Alfred Renyi Known for functional analysis
integral equations
ergodic theory
Riesz representation theorem
Riesz–Fischer theorem
Riesz space
Hardy space
L space
Riesz's lemma
Radon–Riesz property
proximity space
F. and M. Riesz theorem Died February 28, 1956, Budapest, Hungary Similar People Marcel Riesz, Lipot Fejer, Alfred Renyi, Constantin Caratheodory, Lajos Kossuth | ||
Frigyes Riesz
Frigyes Riesz (Hungarian: Riesz Frigyes, [ˈriːs ˈfriɟeʃ]; 22 January 1880 – 28 February 1956) was a Hungarian mathematician who made fundamental contributions to functional analysis.
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Life and career
He was born into a Jewish family in Gyor, Kingdom of Hungary, Austria-Hungary and died in Budapest, Hungary. Between 1911 and 1919 he was a professor at the Franz Joseph University in Kolozsvar, 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. 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. 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 Alfred 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.