On equivariant bundles and their moduli spaces

Let $G$ be an algebraic group and $\Gamma $ a finite subgroup of automorphisms of $G$. Fix also a possibly ramified $\Gamma $-covering $\widetilde{X} \rightarrow X$. In this setting one may define the notion of $(\Gamma ,G)$-bundles over $\widetilde{X}$ and, in this paper, we give a description of t...

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Main Author: Damiolini, Chiara
Format: Article
Language:English
Published: Académie des sciences 2024-02-01
Series:Comptes Rendus. Mathématique
Online Access:https://comptes-rendus.academie-sciences.fr/mathematique/articles/10.5802/crmath.524/
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author Damiolini, Chiara
author_facet Damiolini, Chiara
author_sort Damiolini, Chiara
collection DOAJ
description Let $G$ be an algebraic group and $\Gamma $ a finite subgroup of automorphisms of $G$. Fix also a possibly ramified $\Gamma $-covering $\widetilde{X} \rightarrow X$. In this setting one may define the notion of $(\Gamma ,G)$-bundles over $\widetilde{X}$ and, in this paper, we give a description of these objects in terms of $\mathcal{H}$-bundles on $X$, for an appropriate group $\mathcal{H}$ over $X$ which depends on the local type of the $(\Gamma ,G)$-bundles we intend to parametrize. This extends, and along the way clarifies, an earlier work of Balaji and Seshadri.
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institution Kabale University
issn 1778-3569
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series Comptes Rendus. Mathématique
spelling doaj-art-be6249050e634ca698121bd05cef240f2025-02-07T11:12:53ZengAcadémie des sciencesComptes Rendus. Mathématique1778-35692024-02-01362G1556210.5802/crmath.52410.5802/crmath.524On equivariant bundles and their moduli spacesDamiolini, Chiara0Department of Mathematics, University of Pennsylvania, Philadelphia, USA; Department of Mathematics, University of Texas at Austin, Austin, USALet $G$ be an algebraic group and $\Gamma $ a finite subgroup of automorphisms of $G$. Fix also a possibly ramified $\Gamma $-covering $\widetilde{X} \rightarrow X$. In this setting one may define the notion of $(\Gamma ,G)$-bundles over $\widetilde{X}$ and, in this paper, we give a description of these objects in terms of $\mathcal{H}$-bundles on $X$, for an appropriate group $\mathcal{H}$ over $X$ which depends on the local type of the $(\Gamma ,G)$-bundles we intend to parametrize. This extends, and along the way clarifies, an earlier work of Balaji and Seshadri.https://comptes-rendus.academie-sciences.fr/mathematique/articles/10.5802/crmath.524/
spellingShingle Damiolini, Chiara
On equivariant bundles and their moduli spaces
Comptes Rendus. Mathématique
title On equivariant bundles and their moduli spaces
title_full On equivariant bundles and their moduli spaces
title_fullStr On equivariant bundles and their moduli spaces
title_full_unstemmed On equivariant bundles and their moduli spaces
title_short On equivariant bundles and their moduli spaces
title_sort on equivariant bundles and their moduli spaces
url https://comptes-rendus.academie-sciences.fr/mathematique/articles/10.5802/crmath.524/
work_keys_str_mv AT damiolinichiara onequivariantbundlesandtheirmodulispaces