Czesław Ryll-Nardzewski
Polish mathematician (1926–2015) / From Wikipedia, the free encyclopedia
Czesław Ryll-Nardzewski (Polish: [ˈt͡ʂɛswaf ˈrɨl narˈd͡zɛfskʲi]; 7 October 1926 – 18 September 2015) was a Polish mathematician.
Czesław Ryll-Nardzewski | |
---|---|
Born | (1926-10-07)7 October 1926 |
Died | 18 September 2015(2015-09-18) (aged 88) |
Nationality | Polish |
Scientific career | |
Fields | Mathematics |
Institutions | Wrocław University of Technology Warsaw University |
Doctoral advisor | Mieczysław Biernacki[2] |
Born in Wilno, Second Polish Republic (now Vilnius, Lithuania), he was a student of Hugo Steinhaus. At the age of 26 he became professor at Warsaw University. In 1959, he became a professor at the Wrocław University of Technology. He was the advisor of 18 PhD theses.[2] His main research areas were measure theory, functional analysis, foundations of mathematics and probability theory. Several theorems bear his name: the Ryll-Nardzewski fixed point theorem,[3] the Ryll-Nardzewski theorem[4][5] in model theory, and the Kuratowski and Ryll-Nardzewski measurable selection theorem.[6][7][8]
He became a member of the Polish Academy of Sciences in 1967.[1] He died in 2015 at the age of 88[1][9] and he is buried in Wrocław at Grabiszyński Cemetery [pl].[10]