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arXiv 1709.06003math.DGhep-thmath.AT
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等变gerbe联络的分类

A classification of equivariant gerbe connections

Byungdo Park, Corbett Redden

摘要:

设G是作用在光滑流形M上的紧李群。本文考虑M上的Meinrenken G-等变丛gerbe联络作为2-广群中的对象。我们证明了这个2-范畴等价于与M相关联的微分商栈上的gerbe联络的2-广群,并且G-等变gerbe联络的同构类被三次微分等变上同调分类.最后,我们考虑了紧半单李群上共轭等变gerbe联络的存在唯一性。

英文摘要:

Let G be a compact Lie group acting on a smooth manifold M. In this paper, we consider Meinrenken's G-equivariant bundle gerbe connections on M as objects in a 2-groupoid. We prove this 2-category is equivalent to the 2-groupoid of gerbe connections on the differential quotient stack associated to M, and isomorphism classes of G-equivariant gerbe connections are classified by degree three differential equivariant cohomology. Finally, we consider the existence and uniqueness of conjugation-equivariant gerbe connections on compact semisimple Lie groups.

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