arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.10387math.RT
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通过数据限制来限制超尖点表示

Restricting Supercuspidal Representations via a Restriction of Data

Adèle Bourgeois

摘要:

设$F$是剩余特征$p$的非阿基米德局部域。设$\mathbb{G}$是定义在$F$上的约化群,它在一个弱分歧扩张上分裂,且集合$G=\mathbb{G}(F)$ .我们假设$p$不整除$\mathbb{G}$的Weyl群的阶。给定一个包含$\mathbb{G}$的导出子群的闭连通$F$ -子群$\mathbb{H}$,研究了$G$的不可约超尖点表示$π=π_G(Ψ)$对$H$的限制,其中$Ψ$是J. K.宇建。我们提供了一个完整的描述$π|_H$到不可约的组成部分,与多重性,通过限制数据的结构$H$ -数据从$Ψ$。类似地,我们定义了Kim-Yu型的限制,以研究非超尖点的$G$的不可约表示的限制。

英文摘要:

Let $F$ be a non-archimedean local field of residual characteristic $p$. Let $\mathbb{G}$ be a reductive group defined over $F$ which splits over a tamely ramified extension and set $G=\mathbb{G}(F)$. We assume that $p$ does not divide the order of the Weyl group of $\mathbb{G}$. Given a closed connected $F$-subgroup $\mathbb{H}$ that contains the derived subgroup of $\mathbb{G}$, we study the restriction to $H$ of an irreducible supercuspidal representation $π=π_G(Ψ)$ of $G$, where $Ψ$ is a $G$-datum as per the J.K. Yu Construction. We provide a full description of $π|_H$ into irreducible components, with multiplicity, via a restriction of data which constructs $H$-data from $Ψ$. Analogously, we define a restriction of Kim-Yu types to study the restriction of irreducible representations of $G$ which are not supercuspidal.

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