[Dottorcomp] Geometry & Topology seminars at Unimib

[Andrea Galasso]

Dear all,

It is our pleasure to announce the biweekly cycle of seminars
"Geometry & Topology seminars at Unimib"
about topics arising in low-dimensional topology, CR-geometry and geometric
quantization.

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

*Date and time*: 21st of February 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=m275983d86f35f393024cdce7da6203ec

Webinar password: 8mqEtmNET83 (86738663 from phones)

We are looking forward to seeing you!

The organizers: Andrea Galasso, Gianluca Faraco
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