Nationality Poland Role Professor of mathematics Doctoral advisor Mieczyslaw Biernacki | Name Czeslaw Ryll-Nardzewski | |
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Born 7 October 1926Wilno, Commonwealth of Poland ( 1926-10-07 ) Institutions Wroclaw University of TechnologyWarsaw University Died September 18, 2015, Wroclaw, Poland Institution Wroclaw University of Technology, University of Warsaw Doctoral students Anzelm Iwanik, Leszek Pacholski | ||
Czesław Ryll-Nardzewski ([ˈt͡ʂɛswav ˈrɨl narˈd͡zɛfskʲi]; 7 October 1926 – 18 September 2015) was a Polish mathematician.
Born in Wilno, Commonwealth of Poland, he was a student of Hugo Steinhaus. At the age of 26 he became professor at the Warsaw University. In 1959, he became a professor at the Wrocław University of Technology. His main research areas are measure theory, functional analysis, foundations of mathematics and probability theory. Several theorems bear his name: the Ryll-Nardzewski fixed point theorem, the Ryll-Nardzewski theorem in model theory, and the Kuratowski and Ryll-Nardzewski measurable selection theorem.
He became a member of the Polish Academy of Sciences in 1967. He died in 2015 at the age of 88.
References
Czesław Ryll-Nardzewski Wikipedia(Text) CC BY-SA