Czesław Ryll-Nardzewski

Czesław Ryll-Nardzewski
Born	7 October 1926 Wilno, Commonwealth of Poland
Died	18 September 2015 (aged 88) Wrocław, Poland
Nationality	Poland
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.

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

References

1. Zmarl Profesor Czesław Ryll-Nardzewski (Polish)

• Short biography at the Polish Academy of Sciences