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arXiv 1812.03033math.NT
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中心态射与尖点自守表示

Central morphisms and Cuspidal automorphic Representations

Jean-Pierre Labesse, Joachim Schwermer

摘要:

设$F$为全局字段。设$G$和$H$是定义在$F$上的两个连通约化群,赋予$F$ -态射$f: H\rightarrow G$使得导出群上的诱导态射$H_{der}\rightarrow G_{der}$是中心同构.我们的主要结果产生特别是以下定理:给定任何不可约尖形表示$π$的$G(\mathbb A_F)$其限制$H(\mathbb A_F)$包含尖形表示$σ$的$H(\mathbb A_F)$。相反,假设$f$是一个内射,则$H(\mathbb A_F)$的任何不可约尖点表示$σ$都出现在$G(\mathbb A_F)$的某个尖点表示$π$的限制中。这个定理有一个明显的局部类比。

英文摘要:

Let $F$ be a global field. Let $G$ and $H$ be two connected reductive group defined over $F$ endowed with an $F$-morphism $f: H\rightarrow G$ such that the induced morphism $H_{der}\rightarrow G_{der}$ on the derived groups is a central isogeny. Our main results yield in particular the following theorem: Given any irreducible cuspidal representation $π$ of $G(\mathbb A_F)$ its restriction to $H(\mathbb A_F)$ contains a cuspidal representation $σ$ of $H(\mathbb A_F)$. Conversely, assuming moreover that $f$ is an injection, any irreducible cuspidal representation $σ$ of $H(\mathbb A_F)$ appears in the restriction of some cuspidal representation $π$ of $G(\mathbb A_F)$. This theorem has an obvious local analogue.

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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