Rémi Boutonnet

I am mostly interested in operator algebras, ergodic theory and geometric group theory.

Recent preprints


  1. On solid ergodicity for Gaussian actions.
    J. Funct. Anal. 263 (2012) 1040-1063. Article, arXiv

  2. W*-superrigidity of mixing Gaussian actions of rigid groups.
    Adv. Math. 244 (2013), 69-90. Article, arXiv

  3. Amalgamated free product type III factors with at most one Cartan subalgebra (with C. Houdayer and S. Raum).
    Compos. Math. 150 (2014), 143-174. Article, arXiv

  4. Maximal amenable subalgebras of von Neumann algebras associated with hyperbolic groups (with A. Carderi).
    Math. Ann. 367 (2017), 1199-1216. Article, arXiv

  5. Maximal amenable von Neumann subalgebras arising from maximal amenable subgroups (with A. Carderi).
    Geom. Funct. Anal. 25 (2015), 1688-1705. Article, arXiv

  6. Local spectral gap in simple Lie groups and applications (with A. Ioana and A. Salehi-Golsefidi).
    Invent. Math. 208 (2017), 715-802. Article, arXiv

  7. II_1 factors with non isomorphic ultrapowers (with I. Chifan and A. Ioana).
    Duke Math. J. 166 (2017), 2023-2051. Article, arXiv

  8. Strong solidity of free Araki-Woods factors (with C. Houdayer and S. Vaes).
    Amer. J. Math. 140 (2018), 1231-1252. arXiv

  9. Structure of modular invariant subalgebras in free Araki-Woods factors (with C. Houdayer).
    Anal. PDE 9 (2016), 1989-1998. Article, arXiv

  10. Amenable absorption in amalgamated free product von Neumann algebras (with C. Houdayer).
    Kyoto J. Math. 58 (2018), no. 3, 583–593. Article, arXiv

  11. A note on uniformly bounded cocycles into finite von Neumann algebras (with J. Roydor).
    Canad. Math. Bull. 61 (2018), no. 2, 236–239. Article.

  12. Crossed-products by locally compact groups: Intermediate subfactors (with A. Brothier).
    Journal of Operator Theory 79 (2018), 101-137. Article, arXiv

  13. Local spectral gap in the group of Euclidean isometries (with A. Ioana).
    Int. Math. Res. Not., rny029, https://doi.org/10.1093/imrn/rny029. Article, arXiv

  14. Properly proximal groups and their von Neumann algebras (with A. Ioana and J. Peterson).
    Preprint 2018, accepted to the Annales de l'ENS, arXiv

Conference proceedings

Lecture notes


Uri Bader, Arnaud Brothier, Alessandro Carderi, Ionut Chifan, Cyril Houdayer, Adrian Ioana, Jesse Peterson, Sven Raum, Jean Roydor, Alireza Salehi-Golsefidi, Stefaan Vaes.