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:
影响因子:
--
通讯作者:
Chen Z
中科院分区:
文献类型:
--
作者:
Chen Z
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.