The cohomology of certain intermediate strata of Kottwitz varieties
Fuente:
arXiv
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| Autore principale: | |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866913929447342080 |
|---|---|
| author | Liu, Yachen |
| author_facet | Liu, Yachen |
| contents | We derive explicit formulas for the Frobenius-Hecke traces of the etale cohomology of certain strata of Kottwitz varieties (which are certain compact unitary type Shimura varieties considered by Kottwitz), in terms of automorphic representations and certain explicit polynomials. We obtain our results using the trace formula, representations of general linear groups over p-adic fields, and a truncation of the formula of Kottwitz for the number of points on Shimura varieties over finite fields. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_04122 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The cohomology of certain intermediate strata of Kottwitz varieties Liu, Yachen Number Theory Algebraic Geometry Representation Theory We derive explicit formulas for the Frobenius-Hecke traces of the etale cohomology of certain strata of Kottwitz varieties (which are certain compact unitary type Shimura varieties considered by Kottwitz), in terms of automorphic representations and certain explicit polynomials. We obtain our results using the trace formula, representations of general linear groups over p-adic fields, and a truncation of the formula of Kottwitz for the number of points on Shimura varieties over finite fields. |
| title | The cohomology of certain intermediate strata of Kottwitz varieties |
| topic | Number Theory Algebraic Geometry Representation Theory |
| url | https://arxiv.org/abs/2507.04122 |