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Czesław Ryll-Nardzewski : ウィキペディア英語版 | Czesław Ryll-Nardzewski
| death_place = Wrocław, Poland | nationality = Poland | fields = Mathematics | workplaces = Wrocław University of Technology Warsaw University | alma_mater = | doctoral_advisor = Mieczysław Biernacki | doctoral_students = Anzelm Iwanik Kazimierz Musiał Leszek Pacholski Rastislav Telgarsky }} Czesław Ryll-Nardzewski (; 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.〔(Zmarl Profesor Czesław Ryll-Nardzewski ) 〕 ==References==
* (Short biography ) at the Polish Academy of Sciences
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