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Monday, February 27, 2023

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4:00pm
3-manifolds built out of 1-dimensional actions (Joint with Geometry/Topology seminar) [3]
02/27/2023 - 4:00pm

In a recent joint work with KyeongRo Kim and Hongtaek Jung, we show that a group of circle homeomorphisms is a 3-manifold group if it preserves a veering pair of invariant laminations. The proof has two parts - the topological part and dynamical part. We will try to explain both aspects. In some sense this is a partial converse to Thurston’s universal circle theorem. 

Location:
LOM206
 
t-structures on the equivariant derived category of the Steinberg variety [4]
02/27/2023 - 4:30pm

The Steinberg variety and the equivariant coherent sheaves on it play a very important role in Geometric Representation theory. In this talk we will discuss various t-structures on the equivariant derived category of the Steinberg of importance for Representation theory in zero and positive characteristics. Based on arXiv:2302.05782 and work in progress.

Location:
LOM 214
 
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[1] https://calendar.math.yale.edu/calendar/grid/day/2023-02-26 [2] https://calendar.math.yale.edu/calendar/grid/day/2023-02-28 [3] https://calendar.math.yale.edu/event/3-manifolds-built-out-1-dimensional-actions-joint-geometrytopology-seminar [4] https://calendar.math.yale.edu/event/t-structures-equivariant-derived-category-steinberg-variety [5] https://calendar.math.yale.edu/print/list/calendar/grid/day/2023-02-27 [6] webcal://calendar.math.yale.edu/calendar/export.ics