Misplaced Pages

Czesław Ryll-Nardzewski (Polish: [ˈt͡ʂɛswaf ˈrɨl narˈd͡zɛfskʲi]; 7 October 1926 – 18 September 2015) was a Polish mathematician.

Life and career

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. 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, 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 and he is buried in Wrocław at Grabiszyński Cemetery [pl].

References

1. ^ "Mathematics Genealogy Project". Retrieved 9 February 2021.
2. ^ Zmarł Profesor Czesław Ryll-Nardzewski (in Polish)
3. Granas, Andrzej; Dugundji, James (2003). Fixed point theory. Springer Monographs in Mathematics. New York: Springer Verlag. pp. 171, 172, 174, 196. doi:10.1007/978-0-387-21593-8. ISBN 0-387-00173-5. MR 1987179. “9. Theorem of Ryll-Nardzewski” (p. 171), “(9.6) Theorem (Ryll-Nardzewski)” (p. 174)
4. Hodges, Wilfrid (1993). "7.3 Countable categoricity". Model theory. Encyclopedia of Mathematics and its Applications. Vol. 42. Cambridge: Cambridge University Press. p. 341. doi:10.1017/CBO9780511551574. ISBN 978-0-521-30442-9. MR 1221741. See Theorem 7.3.1
5. Cameron, Peter J. (1990). "2.5 The Ryll-Nardzewski Theorem". Oligomorphic permutation groups. London Mathematical Society Lecture Note Series. Vol. 152. Cambridge: Cambridge University Press. p. 30. doi:10.1017/CBO9780511549809. ISBN 0-521-38836-8. MR 1066691. Zbl 0813.20002. Cf. (2.10)
6. Bogachev, Vladimir I. (2007). Measure theory. Vol. II. Berlin: Springer Verlag. pp. 36, 441. doi:10.1007/978-3-540-34514-5. ISBN 978-3-540-34513-8. MR 2267655. See Theorem 6.9.3 on p. 36 and the historical comment on p. 441
7. Kechris, Alexander S. (1995). "II. Borel Sets". Classical descriptive set theory. Graduate Texts in Mathematics. Vol. 156. New York: Springer Verlag. p. 76. doi:10.1007/978-1-4612-4190-4. ISBN 0-387-94374-9. MR 1321597. See Theorem (12.13) at the bottom of p. 76
8. Cascales, Bernardo; Kadets, Vladimir; Rodríguez, José (2010). "Measurability and selections of multi-functions in Banach spaces". Journal of Convex Analysis. 17 (1): 229–230. MR 2642727. See Theorem A
9. Michał, Morayne (2016). "Czesław Ryll-Nardzewski (1926-2015)". Wiadomości Matematyczne. Series II. 52 (1): 163–165. doi:10.14708/wm.v52i1.3385. MR 3559446.
10. "Grave record for Czesław Ryll-Nardzewski (7 Oct 1926 - 18 Sep 2015), BillionGraves Record 25205206 Wrocław, wrocławski, dolnośląskie, Poland".

• Short biography at the Polish Academy of Sciences

This article about a Polish mathematician is a stub. You can help Misplaced Pages by expanding it.

• v
• t
• e

• 1926 births
• 2015 deaths
• Model theorists
• Scientists from Vilnius
• People from Wilno Voivodeship (1926–1939)
• Polish mathematicians
• Recipients of the State Award Badge (Poland)
• Polish mathematician stubs