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Tuesday, February 17, 2026

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4:00pm
Superrigidity of rich representations [3]
02/17/2026 - 4:30pm
InĀ this talk, I will introduce the class of geodesically rich representations. These are representations of (real or complex) hyperbolic lattices that preserve a significant amount of the geometric structure of the associated quotient manifold. When the quotient manifold has robust geometric structure, these representations exhibit rigidity phenomena. In particular, a recent superrigidity theorem for rich representations was used to prove that finite-volume hyperbolic manifolds with infinitely many maximal totally geodesic submanifolds are arithmetic (Bader-Fisher-Miller-Stover). I will discuss a new superrigidity theorem for rich representations that efficiently recovers existing results and addresses target groups that were previously inaccessible.
Location:
KT 207
 
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[1] https://calendar.math.yale.edu/calendar/grid/day/2026-02-16 [2] https://calendar.math.yale.edu/calendar/grid/day/2026-02-18 [3] https://calendar.math.yale.edu/event/superrigidity-rich-representations [4] https://calendar.math.yale.edu/print/list/calendar/grid/day/2026-02-17 [5] webcal://calendar.math.yale.edu/calendar/export.ics