On the occasion of the 100th anniversary of Professor Czesław Ryll-Nardzewski's birth, the Ryll-Nardzewski Center at Wrocław University of Science and Technology announces the competition for the Ryll-Nardzewski Prize. The prize is to be awarded for outstanding achievements in mathematics in areas related to the work of Czesław Ryll-Nardzewski, published no earlier than 2016. No other eligibility restrictions apply.

The Ryll-Nardzewski Prize of €25,000 is sponsored by the Mayor of Wrocław. Nominations should be submitted to crn.prize@pwr.edu.pl by December 31, 2025.

Partner Institutions

• Faculty of Pure and Applied Mathematics, Wrocław University of Science and Technology
• Faculty of Mathematics and Computer Science, University of Wrocław
• Institute of Mathematics of the Polish Academy of Sciences
• Polish Mathematical Society
• City Hall of Wrocław

Prize Committee of the Ryll-Nardzewski Prize

• Taras Banakh (Ivan Franko National University of Lviv) general topology, combinatorics of infinite sets, functional analysis
• Vitaly Bergelson (Ohio State University) ergodic theory, combinatorics, Ramsey theory
• Béla Bollobás (University of Cambridge, University of Memphis) combinatorics, graph theory, discrete probability, additive number theory
• Krzysztof Burdzy (University of Washington) probability theory, stochastic processes, stochastic analysis
• Hélène Frankowska (CNRS, Sorbonne Université) convex analysis, optimal control systems, nonlinear analysis
• Andrzej Kisielewicz (Wrocław University of Science and Technology) algebra, group theory, combinatorics, logic
• Izabella Łaba (University of British Columbia) harmonic analysis, wavelets theory, combinatorics in analysis, number theory
• Rafał Latała (University of Warsaw) high dimensional probability, stochastic inequalities, geometric functional analysis
• Elon Lindenstrauss (Hebrew University of Jerusalem) ergodic theory, dynamical systems, number theory
• Jan van Mill (University of Amsterdam) general topology, infinite-dimensional topology, theory of Banach spaces
• Mariusz Mirek (Rutgers University, University of Wrocław) Fourier analysis and applications
• René Schilling (Technische Universität Dresden) semigroups of operators, stochastic processes, functional analysis, PDEs
• Adam Skalski (Institute of Mathematics of the Polish Academy of Sciences) operator algebras, quantum theory, noncommutative probability theory

Detailed information

The Ryll-Nardzewski Prize of €25,000 is funded by the Mayor of Wrocław.

The prize is awarded on the basis of an article, or a cohesive series of articles, published in mathematical journals after 2016, thematically related to the work of Czesław Ryll-Nardzewski — including but not limited to logic, descriptive set theory, probability, stochastic processes, functional analysis, harmonic analysis, measure theory, and ergodic theory.

The winner

The Ryll-Nardzewski Prize is awarded to Marcin Sabok from McGill University in recognition of his proof that the Borel complexity of the isomorphism problem for separable C*-algebras coincides with that of the universal orbit equivalence relation. The result answered an important question in the descriptive set theory of complexity, completing a circle of ideas due to Farah, Hjorth, Kechris and other mathematicians. The arguments of Sabok rely on an ingenious construction,
which for a given bounded perfect Polish metric space produces a Choquet simplex ‘remembering’ the structure of that space, and use in a key step a selection theorem due to Ryll-Nardzewski.