Affine Deligne-Lusztig varieties of higher level and the local Langlands correspondence for $GL_2$

Affine Deligne-Lusztig varieties of higher level and the local Langlands correspondence for $GL_2$
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更高级别的 Affine Deligne-Lusztig 品种和 $GL_2$ 的当地 Langlands 对应关系

DOI:
10.1016/j.aim.2016.05.019
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发表时间:
2015
期刊:
arXiv: Algebraic Geometry
影响因子:
--
通讯作者:
A. Ivanov
A. Ivanov
中科院分区:
--
文献类型:
--
作者:
A. Ivanov

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在本文中,我们定义了非阿基米德局部域上附着于连通还原群的仿射Deligne-Lusztig簇的覆盖。在GL 2和正特征的情况下,这些变种的ℓ上同调实现了局部朗兰兹对应的无分支尖端部分。我们通过与Bushnell-Henniart通过尖顶类型实现局部朗兰兹的详细比较来说明这一点。所有的证据都是地方性的。
In the present article we define coverings of affine Deligne–Lusztig varieties attached to a connected reductive group over a non-archimedean local field. In the case of GL 2 and positive characteristic, the unramified cuspidal part of the local Langlands correspondence is realized in the ℓ-adic cohomology of these varieties. We show this by giving a detailed comparison with the realization of local Langlands via cuspidal types by Bushnell–Henniart. All proofs are purely local.