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A note on degenerate Whittaker models for general linear groups
Journal of Number Theory ( IF 0.6 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.jnt.2019.08.018
Arnab Mitra

Abstract Given a Speh representation π of GL n ( F ) for a non-archimedean local field F, we obtain necessary and sufficient conditions on standard parabolic subgroups for the Jacquet module of π with respect to the parabolic subgroup to be generic. Using this we describe the precise set of characters Θ of the maximal unipotent radical U n of GL n ( F ) such that Hom U n ( π , Θ ) is non-zero. We then describe the behavior of this set under the base change map (with respect to a finite cyclic extension of F of prime degree).

中文翻译:

关于一般线性群的退化 Whittaker 模型的说明

摘要 给定非阿基米德局部场 F 的 GL n ( F ) 的 Speh 表示 π,我们获得了标准抛物线子群的充分必要条件,使 π 的 Jacquet 模相对于抛物线子群成为泛型。使用它,我们描述了 GL n ( F ) 的最大单能部首 U n 的精确字符集 Θ,使得 Hom U n (π , Θ ) 非零。然后我们描述了这个集合在基本变化映射下的行为(关于素数 F 的有限循环扩展)。
更新日期:2020-04-01
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