dorsal/arxiv
View SchemaDeep level Deligne--Lusztig induction for tamely ramified tori
| Authors | Alexander B. Ivanov, Sian Nie |
|---|---|
| Categories | |
| ArXiv ID | 2601.06929vv1 |
| URL | https://arxiv.org/abs/2601.06929 |
| License | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
Abstract
Deep level Deligne--Lusztig representations, which are natural analogues of classical Deligne--Lusztig representations, recently play an important role in geometrization of irreducible supercuspidals of $p$-adic groups. In this paper, we propose a construction of deep level Deligne--Lusztig varieties/representations in the tamely ramified case, extending previous constructions in the unramified case. As an application, under a mild assumption on the residue field, we show that each regular irreducible supercuspidal is the compact induction of a deep level Deligne--Lusztig representation, and generally, each irreducible supercuspidal is a direct summand of the compact induction of the cohomology of a deep level Deligne--Lusztig variety.
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"abstract": "Deep level Deligne--Lusztig representations, which are natural analogues of classical Deligne--Lusztig representations, recently play an important role in geometrization of irreducible supercuspidals of $p$-adic groups. In this paper, we propose a construction of deep level Deligne--Lusztig varieties/representations in the tamely ramified case, extending previous constructions in the unramified case. As an application, under a mild assumption on the residue field, we show that each regular irreducible supercuspidal is the compact induction of a deep level Deligne--Lusztig representation, and generally, each irreducible supercuspidal is a direct summand of the compact induction of the cohomology of a deep level Deligne--Lusztig variety.",
"arxiv_id": "2601.06929",
"authors": [
"Alexander B. Ivanov",
"Sian Nie"
],
"categories": [
"math.RT",
"math.AG"
],
"license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
"title": "Deep level Deligne--Lusztig induction for tamely ramified tori",
"url": "https://arxiv.org/abs/2601.06929",
"version": "v1"
},
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