Foliations in PSL(4,R)-Teichmüller theory

Tue Nov 19, 2024 4:00 p.m.—5:00 p.m.
Exterior of Sheffield-Sterling-Strathcona Hall featuring a stone carving of Yale's coat of arms and motto

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Seminar: 
Geometry & Topology

Event time: 
Tuesday, November 19, 2024 - 4:00pm

Location: 
KT 207

Speaker: 
Alex Nolte

Speaker affiliation: 
Rice University/Georgia Tech

Event description: 
We will present a classification of group-invariant foliations of a domain of discontinuity for PSL(4,R)-Hitchin representations whose leaves are properly convex domains in projective spaces. Two foliations of this form are the starting point of Guichard-Wienhard’s beautiful framework to describe the projective geometry of PSL(4,R)-Hitchin representations; the main result is that there is exactly one other similar foliation. We will emphasize how the special structure of Hitchin representations can be used to understand the shape of these domains of discontinuity, and the role this plays in the proof.