Czesław Ryll-Nardzewski

Czesław Ryll-Nardzewski (Polish: [ˈt͡ʂɛswav 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)
Wrocław,[1] Poland
Scientific career
InstitutionsWrocław University of Technology
Warsaw University
Doctoral advisorMieczysław Biernacki

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 the Warsaw University. In 1959, he became a professor at the Wrocław University of Technology. The advisor of many PhD[2]. 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[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 the Wrocław, cm. Grabiszyński [10].


  1. Zmarł Profesor Czesław Ryll-Nardzewski (in Polish)
  2. "Mathematics Genealogy Project".
  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. 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. 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. 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. 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. Annales Societatis Mathematicae Polonae 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".

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