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- W2809506290 abstract "Truncated shifted Yangians are a family of algebras which naturally quantize slices in the affine Grassmannian. These algebras depend on a choice of two weights $lambda$ and $mu$ for a Lie algebra $mathfrak{g}$, which we will assume is simply-laced. In this paper, we relate the category $mathcal{O}$ over truncated shifted Yangians to categorified tensor products: for a generic integral choice of parameters, category $mathcal{O}$ is equivalent to a weight space in the categorification of a tensor product of fundamental representations defined by the third author using KLRW algebras. We also give a precise description of category $mathcal{O}$ for arbitrary parameters using a new algebra which we call the parity KLRW algebra. In particular, we confirm the conjecture of the authors that the highest weights of category $mathcal{O}$ are in canonical bijection with a product monomial crystal depending on the choice of parameters. This work also has interesting applications to classical representation theory. In particular, it allows us to give a classification of simple Gelfand-Tsetlin modules of $U(mathfrak{gl}_n)$ and its associated W-algebras." @default.
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- W2809506290 date "2018-06-20" @default.
- W2809506290 modified "2023-10-11" @default.
- W2809506290 title "On category $mathcal{O}$ for affine Grassmannian slices and categorified tensor products" @default.
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