arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2108.07352math.DG
收藏

主丛广群及其规范群和神经

Principal bundle groupoids, their gauge group and their nerve

Alfonso Garmendia, Sylvie Paycha

摘要:

我们在主丛范畴中考虑群胚,我们称之为主丛(PB)群胚。灵感来自于Th。Nikolaus和K. Waldorf,我们将流形上的格贝斯丛推广到群胚上的格贝斯丛,并讨论了PB群胚与群胚上的格贝斯丛之间的函子对应。从一个PB广群到一个纤维积广群,我们在另一个纤维积广群上建立一个bundle gerbe。相反,从李群胚上的丛格贝,我们建立一个PB群胚。它有一个平凡基,从任何具有平凡基的PB广群,我们建立了李群胚上的丛格。在这种情况下,所得到的丛gerbe同构为PB广群的部分商的广群。我们描述了PB群胚的神经和它们的部分分支,它们是主丛范畴中的单纯对象。应用这种构造,我们可以定义部分商广群的神经的内部变换群,并描述相应的丛格伯的变换。

英文摘要:

We consider groupoids in the category of principal bundles, which we call principal bundles (PB) groupoids. Inspired by work by Th. Nikolaus and K. Waldorf, we generalise bundle gerbes over manifolds to bundle gerbes over groupoids and discuss a functorial correspondence between PB groupoids and bundle gerbes over groupoids. From a PB groupoid over a fibre product groupoid, we build a bundle gerbe over another fibre product groupoid. Conversely, from a bundle gerbe over a Lie groupoid, we build a PB groupoid. It has a trivial base and from any PB groupoid with trivial base, we build a bundle gerbe over a Lie groupoid. In that case, the resulting bundle gerbe is isomorphic as a groupoid to a partial quotient of the PB groupoid. We describe the nerves of PB groupoids and their partial quotients, which are simplicial objects in the category of principal bundles. Applying this construction enables us to define the inner transformation group of the nerve of a partial quotient groupoid and to describe the transformations of the corresponding bundle gerbe.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑