[Dottorcomp] Geometry & Topology seminars at Unimib

[Andrea Galasso]

Dear all,

We have rescheduled the first talk of the cycle of seminars
"Geometry & Topology seminars at Unimib"
see below for more information.

The first speaker is *Yohann Bouilly*, (University of Strasbourg).
The speaker will deliver the talk *online* via Webex platform and the
meeting will be *streamed also in room 3014*, at the building U5-Ratio,
Università degli Studi di Milano Bicocca.

*Date and time*: 1st of March 2023, 2 pm (CET)

*Title*: Torelli subgroup action on character varieties

*Abstract*: The character varieties of a surface encode geometric
structures as Teichmüller space or holomorphic vector bundles. The mapping
class group of the surface acts on the character varieties and preserves a
measure. This action is known to be properly discontinuous on the
Teichmüller space but its behavior is different for character varieties in
a compact group (the action is known to be ergodic) and some ergodicity
conjecture and results exist for exotic components.
In this talk we will explain why the Torelli subgroup, which is the kernel
of the action of the mapping class group on the first homology space, acts
ergodically on character varieties in a compact Lie group and what happens
for exotic components for SL2-character varieties.

*Information to attend in room 3014*
The seminar will take place in room 3014, at the building U5-Ratio,
Università degli Studi di Milano Bicocca.
*Information to attend online *
https://unimib.webex.com/unimib/j.php?MTID=m57db44d26f6b26976c8c1a3ed885262e
Webinar password: 2iqWqNNnm42 (24797666 from phones)

We are looking forward to seeing you!

The organizers: Gianluca Faraco, Andrea Galasso
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