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On the unramified Eisenstein spectrum

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arxiv 2203.03486 v3 pith:ZU332L62 submitted 2022-03-03 math.NT math.AGmath.ATmath.RT

classification math.NTmath.AGmath.ATmath.RT
keywords groupeisensteinspectrumunramifiedadditivealgebrabackslashcertain
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abstract

For a split reductive group ${}^L G$ over a global field, we determine the spectrum of the spherical Hecke algebra coming from the unramified Eisenstein series for the minimal parabolic ${}^L B$. This is done using a certain decomposition of the Springer stack $T^*(B \backslash G/ B)$ for the Langlands dual group in the additive group of cobordisms of cohomologically proper derived quotient stacks.

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  1. Nonabelian shift operators and shifted Yangians

    math.AG 2024-12 conditional novelty 6.0 of 10

    New nonabelian shift operators and wall-crossing identities show that the quantized Coulomb branch of pure GL_n gauge theory is a quotient of the shifted Yangian Y_{-nα}(sl2), with vertex functions as Hecke eigenfunctions.

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