On Bessel distributions for quasi-split groups (Q2719036)

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scientific article; zbMATH DE number 1597927
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On Bessel distributions for quasi-split groups
scientific article; zbMATH DE number 1597927

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    On Bessel distributions for quasi-split groups (English)
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    14 May 2001
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    Bessel function
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    local field
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    quasi-split reductive group
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    Bessel distribution
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    Let \(F\) be a local field and let \(G\) be a quasi-split reductive group defined over \(F\). Let \(\pi\) be a generic representation of \(G(F)\). The author then shows that the Bessel distribution in the so-called Bessel model of \(\pi\) is in fact a function on the open Bruhat cell. In fact the function (Bessel function) is real analytic in the archimedean case and locally constant in the non-archimedean case. The proof involves a close analysis of the distribution and its relation to the compact open subgroups of \(G(F)\).
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