[Dottorcomp] Geometry & Topology seminars at Unimib

[Andrea Galasso]

Dear all,

As a part of "Geometry & Topology seminars at Unimib", it is our pleasure
to announce the second speaker:
*Lorenzo Ruffoni*, (*Tufts University*).
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*: 8th of March 2023, 2 pm (CET)

*Title*: Manifolds without real projective structures

*Abstract*: Every surface admits a metric of constant curvature. Similarly,
every 3-manifold can be decomposed into pieces that admit a geometric
structure locally modeled on a homogeneous space. In both cases, the most
common model is the real hyperbolic space, and each model geometry can be
realized inside the real projective space. On the other hand, in dimension
at least 4 there are smooth manifolds that cannot be modeled on the real
projective space. Previously known examples of such “non-geometric”
manifolds are small, in the sense that their fundamental groups are finite
or virtually cyclic. In this talk I will show how to construct examples in
dimension at least 5 whose fundamental groups are non-elementary Gromov
hyperbolic groups.

*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 *
*Join from the meeting link*
https://unimib.webex.com/unimib/j.php?MTID=ma78d63607486c4669ebb7039fbad5bec
*Join by meeting number*
Meeting number (access code): 2740 850 6296
Meeting password: YTinwMmU353 (98469668 from phones)


We are looking forward to seeing you!

The organizers: Gianluca Faraco, Andrea Galasso
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