Workshop 1 - Operator Algebras: Groups and Dynamics
de
lundi 28 septembre 2026 (08:30)
à
vendredi 2 octobre 2026 (17:30)
lundi 28 septembre 2026
09:30
Welcome Coffee/ Badge Distribution
Welcome Coffee/ Badge Distribution
09:30 - 10:00
Room: Amphithéâtre Hermite
10:00
Opening Speech by IHP's Deputy Director, Prof. Mariana Grana
Opening Speech by IHP's Deputy Director, Prof. Mariana Grana
10:00 - 10:10
Room: Amphithéâtre Hermite
10:10
Uri Bader: How to get infected with Lp-cohomology and how to cure it?
Uri Bader: How to get infected with Lp-cohomology and how to cure it?
10:10 - 10:55
Room: Amphithéâtre Hermite
10:55
Coffee break
Coffee break
10:55 - 11:15
Room: Amphithéâtre Hermite
11:15
Simon Machado: Quantitative growth of the injectivity radius
Simon Machado: Quantitative growth of the injectivity radius
11:15 - 12:00
Room: Amphithéâtre Hermite
12:00
Lunch
Lunch
12:00 - 14:00
Room: Amphithéâtre Hermite
14:00
Adrian Ioana: Rigidity for graph product von Neumann algebras
Adrian Ioana: Rigidity for graph product von Neumann algebras
14:00 - 14:45
Room: Amphithéâtre Hermite
14:45
Coffee break
Coffee break
14:45 - 15:15
Room: Amphithéâtre Hermite
15:15
Ursula Hamenstädt: Mixing and counting in relatively hyperbolic groups
Ursula Hamenstädt: Mixing and counting in relatively hyperbolic groups
15:15 - 16:00
Room: Amphithéâtre Hermite
16:15
Hanna Oppelmayer: Random subalgebras
Hanna Oppelmayer: Random subalgebras
16:15 - 17:00
Room: Amphithéâtre Hermite
mardi 29 septembre 2026
10:00
Emmanuel Breuillard
Emmanuel Breuillard
10:00 - 10:45
Room: Amphithéâtre Hermite
10:45
Coffee break
Coffee break
10:45 - 11:15
Room: Amphithéâtre Hermite
11:15
Tianyi Zheng: Commensurating actions and the Sierpiński carpet group
Tianyi Zheng: Commensurating actions and the Sierpiński carpet group
11:15 - 12:00
Room: Amphithéâtre Hermite
12:00
Group Photo
Group Photo
12:00 - 12:10
Room: Amphithéâtre Hermite
12:10
Lunch
Lunch
12:10 - 14:00
Room: Amphithéâtre Hermite
14:00
Yehuda Shalom
Yehuda Shalom
14:00 - 14:45
Room: Amphithéâtre Hermite
14:45
Coffee break
Coffee break
14:45 - 15:15
Room: Amphithéâtre Hermite
15:15
Goulnara Arzhantseva: Simple and selfless reduced group C*-algebras
Goulnara Arzhantseva: Simple and selfless reduced group C*-algebras
15:15 - 16:00
Room: Amphithéâtre Hermite
16:15
Corentin Le Bars: Charmenability of twin-building lattices
Corentin Le Bars: Charmenability of twin-building lattices
16:15 - 17:00
Room: Amphithéâtre Hermite
18:00
Cocktail
18:00 - 20:30
Room: Espace Emmy Noether, 2nd floor, Perrin Building
mercredi 30 septembre 2026
09:30
Pierre-Emmanuel Caprace: Mixing versus amenability for unitary representations of groups acting on buildings
Pierre-Emmanuel Caprace: Mixing versus amenability for unitary representations of groups acting on buildings
09:30 - 10:15
Room: Amphithéâtre Hermite
10:15
Coffee break
Coffee break
10:15 - 10:45
Room: Amphithéâtre Hermite
10:45
Denis Osin: A paradoxical route from hyperbolic geometry to proper proximality
Denis Osin: A paradoxical route from hyperbolic geometry to proper proximality
10:45 - 11:30
Room: Amphithéâtre Hermite
11:30
Shirly Geffen: Stable rank one in nonnuclear C*-algebras
Shirly Geffen: Stable rank one in nonnuclear C*-algebras
11:30 - 12:15
Room: Amphithéâtre Hermite
jeudi 1 octobre 2026
10:00
Waltraud Lederle: Boomerang subgroups, Schreier graphs and avoiding invariant measures
Waltraud Lederle: Boomerang subgroups, Schreier graphs and avoiding invariant measures
10:00 - 10:45
Room: Amphithéâtre Hermite
10:45
Coffee break
Coffee break
10:45 - 11:15
Room: Amphithéâtre Hermite
11:15
Mehrdad Kalantar: On Invariant Random Subgroups of C*-Simple Groups
Mehrdad Kalantar: On Invariant Random Subgroups of C*-Simple Groups
11:15 - 12:00
Room: Amphithéâtre Hermite
12:00
Lunch
Lunch
12:00 - 14:00
Room: Amphithéâtre Hermite
14:00
Sven Raum: K-theory and delocalised traces of right-angled Hecke C*-algebras
Sven Raum: K-theory and delocalised traces of right-angled Hecke C*-algebras
14:00 - 14:45
Room: Amphithéâtre Hermite
14:45
Coffee break
Coffee break
14:45 - 15:15
Room: Amphithéâtre Hermite
15:15
Itamar Vigdorovich: Selfless reduced group C*-algebras
Itamar Vigdorovich: Selfless reduced group C*-algebras
15:15 - 16:00
Room: Amphithéâtre Hermite
16:15
Arie Levit: Invariant random subgroups of the finitary special linear group over a finite field
Arie Levit: Invariant random subgroups of the finitary special linear group over a finite field
16:15 - 17:00
Room: Amphithéâtre Hermite
vendredi 2 octobre 2026
10:00
Fanny Kassel: Anosov representations and compact quotients
Fanny Kassel: Anosov representations and compact quotients
10:00 - 10:45
Room: Amphithéâtre Hermite
10:45
Coffee break
Coffee break
10:45 - 11:15
Room: Amphithéâtre Hermite
11:15
David Fisher: Dense subgroups of compact groups: two vignettes
David Fisher: Dense subgroups of compact groups: two vignettes
11:15 - 12:00
Room: Amphithéâtre Hermite