Group actions and rigidity: around the Zimmer program

The Institute Henri Poincaré in Paris will host the trimester program “Group actions and rigidity: around the Zimmer program” from April 15th to July 5th, 2024.

More information and registration for both the program and individual workshops is open at

Registration is free but mandatory. The deadline to apply for financial support is November 1st, 2023. We encourage workshop participants to also register for the trimester program.

As well as minicourses throughout the trimester, there will be the following conferences and activities:

  • Introductory mini-school, April 15 to 19, 2024: Rigidity, Dynamics and Geometric Structures, held at CIRM, Marseille. Further details and registration at

  • Workshop 1, April 29 to Saturday, May 4, 2024: Low Dimensional Actions (IHP, Paris)

  • Workshop 2 May 27 to 31, 2024: Group Actions with Hyperbolicity and Measure Rigidity (IHP, Paris)

  • Workshop 3, June 10 to 14, 2024: Actions of Large Groups, Geometric Structures, and the Zimmer Program (IHP, Paris)

More information will be posted on the trimester webpage as it becomes available.