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Paper detail

Ext-enhanced monoidal Koszul duality for $\mathrm{GL}_2$

The Hecke category participates in an equivalence called monoidal Koszul duality, which exchanges it with the category of (Langlands-dual) "free-monodromic tilting sheaves." Motivated by a recent conjecture of Gorsky and the first-named author on HOMFLYPT link homology, we propose to enhance this duality with an additional grading. We provide evidence for this enhancement in the case of $\mathrm{GL}_2$, working in the language of the second-named author's joint work with Achar, Riche, and Williamson.

preprint2020arXivOpen access
Matthew HogancampShotaro Makisumi
math.RT
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Matthew HogancampShotaro Makisumi

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