Endoscopy for metaplectic affine Hecke categories

The seminar series covers topics in Algebra and Topology

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Date/time
16 Sep 2025 3:00pm - 16 Sep 2025 4:00pm
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Speakers

Yau Wing Li (The University of Melbourne)
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Description

Abstract:

Lusztig (1994) studied sheaves on the enhanced affine flag variety with fixed monodromy along Kac-Moody torus orbits, developing a framework that later became central to the metaplectic and quantum geometric Langlands program. In joint work with Gurbir Dhillon, Zhiwei Yun, and Xinwen Zhu, we show that these monodromic affine Hecke categories are equivalent to non-monodromic affine Hecke categories of smaller groups, constructed via an affine analogue of Langlands’ endoscopy, extending results of Lusztig and Yun for finite Hecke categories. Applications include endoscopic equivalences, confirming a series conjectured by Gaitsgory in quantum geometric Langlands.

Location

Room 1.33, Hanna Neumann Building #145

-35.275496166062, 149.1193313593

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