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Geometry & Topology Seminar

Title: On theta-positive surface subgroups in PO(p,q)
Speaker: Maria Beatrice Pozzetti (Heidelberg University)
Date: 01 December 2021
Time: 4:00 pm
Venue: MS teams (team code hiq1jfr)

Surprisingly there exist connected components of character varieties of fundamental groups of surfaces in semisimple Lie groups only consisting of injective representations with discrete image. Guichard and Wienhard introduced the notion of $\Theta$ positive representations as a conjectural framework to explain this phenomena. I will discuss joint work with Jonas Beyrer in which we establish several geometric properties of $\Theta$ positive representations in PO(p,q). As an application we deduce that they indeed form connected components of character varieties.


Contact: +91 (80) 2293 2711, +91 (80) 2293 2265 ;     E-mail: chair.math[at]iisc[dot]ac[dot]in
Last updated: 08 Dec 2021