
François Le Maître
Bureau: 232, aile A, bâtiment Mirande
Mail: flemaitre
@
math.cnrs.fr
Tel: 03 80 39 90 59
Institut de Mathématiques de Bourgogne
9 avenue Alain Savary
BP 47870
21078 Dijon
Le contenu de ce site web a été réalisé sans recours à l'IA générative.
Je suis professeur de mathématiques à l'IMB, dont je suis directeur adjoint, au sein de l'équipe GADT.
J'effectue mes enseignements à Polytech Dijon,
et je suis responsable des 1A du cycle préparatoire PEIP A.
Je suis membre junior de l'IUF depuis septembre 2025. Voici un CV détaillé mis à jour en septembre 2025.
En tant que membre de la SMF, je ne peux qu'encourager tout le monde à y adhérer également (c'est gratuit pour les doctorant·e·s).
Les LLM reposent sur l'exploitation de millions de "data workers" chargés d'"aligner les modèles".
Je trouve leur utilisation injustifiable d'un point de vue éthique, sans parler du coût environnemental délirant.
Je suis donc totalement opposé à leur utilisation et, à ce titre, membre de l'Association for Human Mathematics.
Évènements
Archives.
Enseignements
Archives.
Voici les documents de quelques cours et/ou TD que j'ai donnés par le passé.
Research
-
Spaces of UCP maps and subalgebras of von Neumann algebras
(with Pierre Fima,
Issan Patri
and Kunal Mukherjee),
preprint. arXiv, pdf.
-
On the Rokhlin lemma for infinite measure-preserving bijections (with Fabien Hoareau),
preprint. arXiv, pdf.
-
L1 full groups of flows (with Konstantin Slutsky),
Accepted for publication in Memoirs of the EMS. arXiv, pdf.
-
On the stability of hyperbolicity under quantitative measure equivalence
(with Thiebout Delabie, Juhani Koivisto and
Romain Tessera),
accepted for publication in Bulletin de la SMF.
arXiv, pdf.
-
On the space of subgroups of Baumslag-Solitar groups II: High transitivity
(with Damien Gaboriau and
Yves Stalder),
submitted.
arXiv, pdf.
-
Michael's selection theorem and applications to the Maréchal topology (with Pierre Fima, Issan Patri and Kunal Mukherjee),
submitted.
arXiv, pdf.
-
On dense orbits in the space of subequivalence relations,
Orbita Mathematicae 3, Nr. 1 (2026), pp. 59–87.
arXiv, DOI, pdf.
-
Polish groups and non-free actions in the discrete or measurable context,
HDR (habilitation thesis), defended on March 14 2024. TEL, pdf,
slides from the defense.
- Classification of non-free p.m.p. boolean actions of ergodic full groups and applications
(with Alessandro Carderi and Alice Giraud),
submitted.
arXiv, pdf.
Here is also a video of my presentation on this topic at IMPAN.
-
Spatial models for boolean actions in the infinite measure-preserving setup (with Fabien Hoareau),
Transactions of the AMS 379 (2026), pp.4263-4305.
arXiv, pdf, DOI.
- On the space of subgroups of Baumslag-Solitar groups I: perfect kernel and phenotype
(with Alessandro Carderi,
Damien Gaboriau and
Yves Stalder),
Revista Mathematica Iberoamericana 41, Nr. 4 (2025), pp. 1711–1758.
arXiv, DOI, pdf, and its companion webpage.
-
Belinskaya's theorem is optimal
(with Alessandro Carderi,
Matthieu Joseph and
Romain Tessera),
Fundamenta Mathematicae 263 (2023), pp. 51-90.
arXiv, DOI, pdf.
- On dense totipotent free subgroups in full groups (with Alessandro Carderi and Damien Gaboriau),
Geometry and Topology 27 (2023), pp. 2297–2318 . arXiv, DOI, pdf.
-
Polish topologies on groups of non-singular transformations,
Journal of Logic and Analysis, 14:4 (2022), 15 pp.
arXiv, DOI, pdf.
- A characterization of high transitivity for groups acting on trees (with Pierre Fima, Soyoung Moon and Yves Stalder),
Discrete Analysis 8:2022, 63 pp. arXiv, DOI, pdf.
- Homogeneous actions on Urysohn spaces (with Pierre Fima,
Julien Melleray and Soyoung Moon),
Colloquium Mathematicum 167 (2022), pp. 21-61. arXiv, DOI, pdf.
- Quantitative measure equivalence between amenable groups (with Thiebout Delabie, Juhani Koivisto and Romain Tessera),
Annales Henri Lebesgue 5 (2022), pp. 1417-1487. arXiv, DOI, pdf.
Un exposé confiné centré sur le profil isopérimétrique,
le tableau. Et le making-of !
- Dense locally finite subgroups of automorphism groups of ultraextensive spaces (with Mahmood Etedadialiabadi, Su Gao and Julien Melleray),
Advances in Mathematics, 391 (2021), 42 pp. arXiv, DOI, pdf.
- On a measurable analogue of small topological full groups II,
Ann. Inst. Fourier 71, nr. 5 (2021), pp. 1885-1927. arXiv, DOI, pdf.
- Bounded normal generation is not equivalent to topological bounded normal generation (with Philip A. Dowerk),
Extracta Mathematicae 34, Nr. 1 (2019), pp. 85-97. DOI,
arXiv, pdf.
- On a measurable analogue of small topological full groups,
Advances in Mathematics, 332 (2018), pp. 235-296. DOI, arXiv, pdf.
Some related slides on the L1 full groups defined therein and a video.
-
Highly faithful actions and dense free subgroups in full groups,
Groups, Geometry and Dynamics 12 (2018), pp. 207-230. DOI, arXiv, pdf.
- Examples of normal compression, appendix to Chief factors in Polish groups by Colin Reid and Phillip Wesolek.
accepted for publication in Math. Proc. Cambridge Philos. Soc.DOI, arXiv.
-
Orbit full groups for locally compact groups (with Alessandro Carderi),
Transactions of the AMS, 370 (2018), pp. 2321-2349. DOI, arXiv, pdf.
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On strongly just infinite profinite branch groups (with Phillip Wesolek),
Journal of group theory 20, Nr. 1 (2017), pp. 1-32. DOI, arXiv, pdf.
-
Infinitesimal generators and quasi non-archimedean topological groups (with Tsachik Gelander),
Topol. Appl. 218 (2017), pp. 97-113. DOI, arXiv, pdf.
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Connected Polish groups with ample generics (with Adriane Kaïchouh),
Bull. London Math. Soc. 47, Nr. 6 (2015) : 996-1009. DOI, arXiv, pdf.
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More Polish full groups (with Alessandro Carderi),
Topol. Appl. 202 (2016), pp. 80-105. DOI, arXiv, pdf.
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On full groups of non ergodic probability measure preserving equivalence relations,
Ergodic Theory Dyn. Syst. 36, Nr. 7 (2016), pp. 2218-2245. DOI, arXiv, pdf.
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The number of topological generators for full groups of ergodic equivalence relations,
Invent. Math. 198, Nr. 2 (2014), pp. 261-268. DOI, arXiv, pdf.
Some related slides on topological generators in full groups.
-
Sur les groupes pleins préservant une mesure de probabilité,
Thèse sous la direction de Damien Gaboriau et Julien Melleray. TEL, pdf.
Slides de la soutenance.
Survey work
Notes
Encadrement
Perso
- Lien vers mon site perso que j'utilise par ailleurs pour stocker des enregistrements vidéos de maths.
Il est hébergé chez moi donc n'hésitez pas à m'envoyer un mail si vous constatez qu'il ne répond plus !