Czesław Ryll-Nardzewski

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Czesław Ryll-Nardzewski
Born (1926-10-07)7 October 1926
Wilno, Commonwealth of Poland
Died 18 September 2015(2015-09-18) (aged 88)
Wrocław, Poland
Nationality Polish
Fields Mathematics
Institutions Wrocław University of Technology
Warsaw University
Doctoral advisor Mieczysław Biernacki
Doctoral students Anzelm Iwanik
Kazimierz Musiał
Leszek Pacholski
Rastislav Telgarsky

Czesław Ryll-Nardzewski (Polish: [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.[citation needed]

He became a member of the Polish Academy of Sciences in 1967. He died in 2015 at the age of 88.[1]

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