Géométrie et Théorie des Modèles

Zoé Chatzidakis, co-organiser and co-founder (together with François Loeser, in 2006) of the GTM seminar, passed away on the 22nd of January 2025 in Paris. Zoé had been for years the life and soul of the scientific life in model theory, in Paris and abroad; this was an immense loss for the mathematical community and for her many friends.

Fondateurs : Zoé Chatzidakis (vous trouverez ici un lien vers le prix de thèse décerné à sa mémoire) et François Loeser.

Organisateurs : Raf Cluckers, Georges Comte, Antoine Ducros, Tamara Servi.

Vous pourrez également trouver les informations relatives au GTM sur sa page dédiée du site des évènements co-organisés par l'IMJ-PRG.

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Les vidéos des exposés passés sont accessibles ici.

PROCHAINE SÉANCE

Vendredi 29 mai 2026 (salle 15-16 101, Jussieu).

11h00. André Belotto (UPC). Resolution of Singular Foliations via Principalization.

I will discuss resolution of singularities for foliations and present our approach via a weighted principalization theorem for ideals on smooth orbifolds equipped with a foliation. As an application, I will describe the resolution of certain foliations in arbitrary dimensions, including Darboux totally integrable foliations. This is joint work with D. Abramovich, M. Temkin, and J. Wlodarczyk.

14h15. Alexi Block-Gorman (Universiteit van Amsterdam). Titre et résumé à venir.

16h00. Tim Santens (Cambridge). The leading constant in Malle's conjecture over function fields.

A conjecture of Malle gives a prediction for the asymptotic growth of the number of number fields with a given Galois group when ordered by their discriminants. Recently, significant progress has been made on the function field analogue of this problem by leveraging topological and algebro-geometric techniques—specifically the homological stability of Hurwitz spaces. In this talk, I will explore the connection between Malle’s Conjecture and the topology of these Hurwitz space. I will then present my recent work, which utilizes these homological stability results to prove a version of Malle's conjecture over function fields with an explicit leading constant.

SÉANCES ULTÉRIEURES

Programme des séances passées : 2006-07, 2007-08, 2008-09, 2009-10, 2010-11, 2011-12, 2012-13, 2013-14, 2014-15, 2015-16, 2016-17, 2017-18, 2018-19, 2019-20, 2020-21, 2021-22, 2022-23, 2023-24, 2024-25.

Ce séminaire est subventionné par : l'IMJ-PRG, UPCité (APPR), le GDR EFI, et la bourse KU Leuven Grant IF C16/23/010.