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Université Paris Cité IMJ-PRG Michele Vergne

Groups in action:

from representations and harmonic analysis on Lie groups to index theory

A meeting in honour of Michèle Vergne's 80th birthday

4-8 September 2023

Institut de Mathématiques de Jussieu - Paris Rive Gauche (IMJ - PRG)

The aim of this meeting, which celebrates Michele Vergne's 80th birthday, is to bring together mathematicians working at the interface of harmonic analysis, representation theory and index theory, with group actions as a leading thread throughout the conference. We expect that the different areas of expertise and the different views on these topics will lead to a fruitful exchange on current research topics. The meeting will be organised around the following topics:

  • Group representations,
  • Index theory, geometric quantisation,
  • Moduli spaces, symplectic geometry, mathematical physics,
  • Polytopes, optimisation and P=NP.


   Anton Alekseev (Université de Genève)    Nigel Higson (Penn State University)    Shu Shen (Sorbonne Université)
   Alexander Barvinok (University of Michigan)    Louis Ioos (Université Cergy Pontoise)    Andras Szenes (Université de Genève)
   Jean-Michel Bismut (Université Paris Saclay)    Karola Mészáros (Cornell University)    Eric Vasserot (Université Paris Cité)
   Benjamin Enriquez (Université de Strasbourg)    Eckhard Meinrenken (University of Toronto)    Michael Walter (Ruhr University Bochum)
   Giovanni Felder (ETH Zurich)    Eva Miranda (UPC Barcelona)    Hang Wang (East China Normal University)   
   Ezra Getzler (Northwestern University)    Nicolas Ressayre (Université Lyon 1)    Weiping Zhang (Chern Institute of Math)
   Pascale Harinck (Ecole Polytechnique)    Silvia Sabatini (University of Cologne)   



Opening Ceremony
The file of Michèle Vergne's Speech is available here .

Registration for the Reception at the French Academy of Sciences (on Monday, September 4th, at 5:00 p.m. at Institut de France, 23 quai de Conti - 75006 Paris) and the Boat Trip (September 6th, from 2:30 p.m. to 3:30 p.m. The boat trip will start at the Eiffel Tower "Bateaux Parisiens Pier")


Xiaonan Ma (Université Paris Cité)
Paul-Émile Paradan (Université de Montpellier)
Sylvie Paycha (Potsdam University)

For all enquiries pertaining to this conference please send an email to

                         IRN Representation Theory

Photo Credit: Photograph by Mariana Cook from Mathematicians: An Outer View of the Inner World, Princeton University Press 2009.