Nori fundamental gerbe of essentially finite covers and Galois closure of towers of torsors

dc.creator	Antei, Marco
dc.creator	Biswas, Indranil
dc.creator	Emsalem, Michel
dc.creator	Tonini, Fabio
dc.creator	Zhang, Lei
dc.date.accessioned	2019-11-14T15:00:58Z
dc.date.accessioned	2021-11-25T20:58:30Z
dc.date.accessioned	2022-10-20T01:29:24Z
dc.date.available	2019-11-14T15:00:58Z
dc.date.available	2021-11-25T20:58:30Z
dc.date.available	2022-10-20T01:29:24Z
dc.date.created	2019-11-14T15:00:58Z
dc.date.created	2021-11-25T20:58:30Z
dc.date.issued	2019
dc.identifier	https://link.springer.com/article/10.1007/s00029-019-0449-z
dc.identifier	1022-1824
dc.identifier	1420-9020
dc.identifier	https://hdl.handle.net/10669/79845.2
dc.identifier	10.1007/s00029-019-0449-z
dc.identifier	820-B7-185
dc.identifier.uri	https://repositorioslatinoamericanos.uchile.cl/handle/2250/4540550
dc.description.abstract	We prove the existence of a Galois closure for towers of torsors under finite group schemes over a proper, geometrically connected and geometrically reduced algebraic stack X over a field k. This is done by describing the Nori fundamental gerbe of an essentially finite cover of X. A similar result is also obtained for the S -fundamental gerbe.
dc.language	eng
dc.relation
dc.source	Selecta Mathematica, vol.25(18), pp.1-37
dc.subject	Nori fundamental gerbe
dc.subject	Essentially finite bundle
dc.subject	Essentially finite cover
dc.subject	Algebraic stack
dc.title	Nori fundamental gerbe of essentially finite covers and Galois closure of towers of torsors
dc.type	artículo científico