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arXiv 1503.08882math.NT
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p-adic典型群的交织半单特征标

Intertwining semisimple characters for p-adic classical groups

Daniel Skodlerack, Shaun Stevens

摘要:

设~ $G$是奇剩余特征的非阿基米德局部域~ $F_0$上的~ $ε$ -厄米特形式~ $h$的酉群.本文引入了一个几何组合条件,在此条件下,我们证明了~ $G$的半单特征标和~ $G$的环境向量空间的一般线性群的“交织蕴涵共轭”.进一步证明了~ $G$在其李代数上作用的一个Skolem-Noether结果,更精确地说,如果有相应的半单特征标插在~ $G$的一个元素上,则~ $G$的两个在~ $F$上具有相同特征多项式的李代数元素必在~ $G$的一个元素下共轭$G$是奇剩余特征的非阿基米德局部域上的酉群。本文研究了~ $G$的不可约光滑表示的“野部”,它被编码为一个所谓的“半单特征标”。我们证明了两个基本的结果,这是至关重要的步骤对尖表示的分类~ $G$。首先引入一个几何组合条件,在此条件下,我们证明了半单特征标在~ $G$和周围一般线性群中的一个“交织蕴涵共轭”定理.其次,证明了~ $G$在其李代数上作用的Skolem-Noether定理,更确切地说,如果存在由~ $G$的一个元素交织的半单层,则~ $G$的李代数中具有相同特征多项式的两个半单元素必在~ $G$的一个元素下共轭.

英文摘要:

Let~$G$ be a unitary group of an~$ε$-hermitian form~$h$ given over a nonarchimedean local field~$F_0$ of odd residue characteristic. We introduce a geometric combinatoric condition under which we prove "Intertwining implies Conjugacy" for semisimple characters of~$G$ and the general linear group of the ambient vector space of~$G$. Further we prove a Skolem-Noether result for the action of~$G$ on its Lie algebra, more precisely two Lie algebra elements of~$G$ which have the same characteristic polynomial over~$F$ must be conjugate under an element of~$G$ if there are corresponding semisimple characters which intertwine over an element of~$G$ } Let~$G$ be a unitary group over a nonarchimedean local field of odd residual characteristic. This paper concerns the study of the "wild part" of the irreducible smooth representations of~$G$, encoded in a so-called "semisimple character". We prove two fundamental results concerning them, which are crucial steps towards a classification of the cuspidal representations of~$G$. First we introduce a geometric combinatoric condition under which we prove an "intertwining implies conjugacy" theorem for semisimple characters, both in~$G$ and in the ambient general linear group. Second, we prove a Skolem--Noether theorem for the action of~$G$ on its Lie algebra; more precisely, two semisimple elements of the Lie algebra of~$G$ which have the same characteristic polynomial must be conjugate under an element of~$G$ if there are corresponding semisimple strata which are intertwined by an element of~$G$.

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