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arXiv 0711.1471math.RT
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(O(V+F),O(V))是局部域F上任意二次空间V的Gelfand对

(O(V+F), O(V)) is a Gelfand pair for any quadratic space V over a local field F

Avraham Aizenbud, Dmitry Gourevitch, Eitan Sayag

摘要:

设V是特征不等于2的任意局部域F上的形式为q的二次空间。令$W=V \oplus Fe$具有形式Q,扩展q,Q(e)=1。考虑O(V)到O(W)的标准嵌入和$O(V)\times O(V)$对$O(W)$的双边作用。本文证明了O(W)上的任何$O(V)\times O(V)$不变分布对于转置是不变的.这个结果在前面的[vD]中对于F=R,在[AvD]中对于F=C和在[BvD]中对于p-adic域以稍微不同的形式被证明。这里我们给出一个不同的证明。利用[AGS]的结果,我们证明了这个关于不变分布的结果意味着对(O(V),O(W))是Gelfand对。在阿基米德设置这意味着,对于任何不可约的容许光滑Frechet表示E的O(W),我们有$dim Hom_{O(V)}(E,C) \leq 1.$一个更强的结果,为p-adic领域得到[AGRS]。

英文摘要:

Let V be a quadratic space with a form q over an arbitrary local field F of characteristic different from 2. Let $W=V \oplus Fe$ with the form Q extending q with Q(e)=1. Consider the standard embedding of O(V) into O(W) and the two-sided action of $O(V)\times O(V)$ on $O(W)$. In this note we show that any $O(V)\times O(V)$-invariant distribution on O(W) is invariant with respect to transposition. This result was earlier proven in a bit different form in [vD] for F=R, in [AvD] for F=C and in [BvD] for p-adic fields. Here we give a different proof. Using results from [AGS], we show that this result on invariant distributions implies that the pair (O(V),O(W)) is a Gelfand pair. In the archimedean setting this means that for any irreducible admissible smooth Frechet representation E of O(W) we have $dim Hom_{O(V)}(E,C) \leq 1.$ A stronger result for p-adic fields is obtained in [AGRS].

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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