The algebraisation of higher Deligne-Lusztig representations

The algebraisation of higher Deligne-Lusztig representations
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高级 Deligne-Lusztig 表示的代数化

DOI:
10.1007/s00029-017-0349-z
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发表时间:
2017
期刊:
Selecta Mathematica
影响因子:
--
通讯作者:
Chen Z
Chen Z
中科院分区:
--
文献类型:
--
作者:
Chen Z

文献摘要

相似文献

本文研究了离散赋值环的有限同元上约化群的高阶Deligne-Lusztig表示。在甚至水平,我们表明,这些几何构造的表示,定义的Lusztig,符合某些明确的诱导表示定义的Gérardin,从而给出了一个解决问题提出的Lusztig。特别是,我们确定这些表示的尺寸。作为直接的应用,我们验证了Letellier forand的猜想。
In this paper we study higher Deligne–Lusztig representations of reductive groups over finite quotients of discrete valuation rings. At even levels, we show that these geometrically constructed representations, defined by Lusztig, coincide with certain explicit induced representations defined by Gérardin, thus giving a solution to a problem raised by Lusztig. In particular, we determine the dimensions of these representations. As an immediate application we verify a conjecture of Letellier forand.