$p$ -进群的中心,I:Newton分解
Cocenters of $p$-adic groups, I: Newton decomposition
摘要:
本文引入了连通约化$p$ -adic群$G$上的Newton分解.在此基础上给出了它的Hecke代数的余中心的一个很好的分解。在这里,我们考虑了与$G$上的通常共轭作用相关的普通共中心和由扭曲内窥镜理论产生的扭曲共中心。我们给出了余中心的牛顿分量上的Iwahori-Matsumoto型生成元。在此基础上,我们证明了Howe猜想在(普通和扭曲)不变分布限制下的推广。最后给出了刚性余心的结构的一个明确的描述。
英文摘要:
In this paper, we introduce the Newton decomposition on a connected reductive $p$-adic group $G$. Based on it we give a nice decomposition of the cocenter of its Hecke algebra. Here we consider both the ordinary cocenter associated to the usual conjugation action on $G$ and the twisted cocenter arising from the theory of twisted endoscopy. We give Iwahori-Matsumoto type generators on the Newton components of the cocenter. Based on it, we prove a generalization of Howe's conjecture on the restriction of (both ordinary and twisted) invariant distributions. Finally we give an explicit description of the structure of the rigid cocenter.
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