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About

The European Set Theory Society supports research and networks in set theory and its connections with related areas in mathematics and logic worldwide. For instance, we organise the biennial European Set Theory Conference (ESTC) series, at which the Hausdorff Medal is awarded, support meetings and distribute information about conferences and worldwide hybrid and online activitites in the blog. We further organise other events such as the European Set Theory Colloquia. The European Set Theory Society is affiliated with the European Mathematical Society. Aims    Trustees    Become a member    Blog   Upcoming talks   Archive



Meetings

The Conference on large cardinals, forcing, and related topics will take place from 7 to 10 February 2026 at the University of California, Irvine.
The European Set Theory Conference 2026 will take place from 18 to 22 May 2026 at the University of Helsinki.
Gödel’s Program, a part of the Simons Semester in Poland, focuses on recent advances in set theory involving Martin’s Maximum, axioms of determinacy and inner models for large cardinals. The program unfolds over five weeks of sustained scientific activity from 31 May to 4 July 2026.
The Young Set Theory Workshop 2026 will take place from 31 August to 4 September 2026 at the University of Barcelona.

Set theory

Set theory is the mathematical theory of the infinite. It is connected with model theory, computability, algebra, combinatorics, graph theory, topology, analysis, measure theory, category theory, game theory, theoretical computer science and philosophy of mathematics. The origins of set theory lie in Georg Cantor's theory of transfinite numbers (1874) and the axiomatization by Zermelo et al. (1908). Modern set theory began with the introduction of the method of forcing by Cohen (1963) and the independence of the continuum hypothesis. In the last decades, set theory has witnessed a renaissance and new research directions have emerged. Literature    Links

News

The Seventh Hausdorff Medal was awarded to Farmer Schlutzenberg. The Hausdorff Medal award ceremony will be held during the 10th European Set Theory Conference, 18–22 May 2026, in Helsinki.
The Seventh European Set Theory Colloquium on the topic Condensed Mathematics and Set Theory will take place online on Thursday, 12 February 2026 at 17:00-19:00 CET. The speakers will be Dianthe Basak, Jeffrey Bergfalk and Fields Medalist Peter Scholze.
The Early Career Award 2025 of the European Set Theory Society was awarded to Jan Grebík for his work in Borel combinatorics and connections with other areas.

On 16 September, 2025 Ronald Jensen passed away. Much of current set theory is based on his work. Read the obituary.