7–11 avr. 2025
Institut de Mathématiques de Toulouse
Fuseau horaire Europe/Paris

Differentials on the sphere and representations of the braid groups

8 avr. 2025, 16:00
1h
Amphithéatre Schwartz ( Institut de Mathématiques de Toulouse)

Amphithéatre Schwartz

Institut de Mathématiques de Toulouse

Université Paul Sabatier 118, route de Narbonne - Bat. 1R3 31062 Toulouse Cedex 9

Orateur

Duc-Manh Nguyen

Description

The fundamental group of a stratum of k-differentials naturally acts on the (co)-homology of the corresponding canonical cyclic covers via monodromy. In the genus zero case, these actions give rise to a series of representations of the pure braid groups. In this talk, I will report a result on the images of those representations. Specifically, I will discuss their Zariski closure and some sufficient conditions for those images to be arithmetic lattices. This is a joint work with G. Menet.

Documents de présentation

Aucun document.