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This is the new website of the European Set Theory Society. See the archive for activities before 2026.
Blog   Upcoming talks (hybrid/online)


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


Set theory

Set theory is the mathematical theory of the infinite with numerous applications and connections with areas such as algebra, topology, real and complex analysis, functional analysis, measure theory, game theory and theoretical computer science. Its origins lie in Georg Cantor's theory of transfinite numbers around 1874 and the axiomatization by Zermelo and others around 1908. Modern set theory began with the introduction of the method of forcing by Cohen in 1963 with the goal of studying the continuum hypothesis. Set theory has witnessed a renaissance in the last decades with the emergence of new research directions.
Literature    Links


News

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 are Dianthe Basak, Jeffrey Bergfalk and Fields Medalist Peter Scholze.
The Hausdorff Medal 2026 of the European Set Theory Society will be awarded at the European Set Theory Conference 2026 on 18-22 May 2026.
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 September 16, 2025 Ronald Jensen passed away. Much of current-day set theory is based on his work. Read the obituary.

Meetings

The Conference on large cardinals, forcing, and related topics will take place on 7-10 February 2026 at the University of California, Irvine.
The European Set Theory Conference 2026 will take place on 18-22 May 2026 at the University of Helsinki.