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arXiv 2407.13614math.DGmath-phmath.DSmath.MP
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主丛联络的积分问题

The integration problem for principal connections

Javier Fernandez, Francisco Kordon

AI总结:

本文提出主丛联络的积分问题,研究给定主丛联络所对应的离散联络集合,证明了平坦情形下唯一性,并在温和条件下给出存在性,交换群时由曲率约束得到唯一解。

摘要:

本文引入了主丛联络的积分问题。正如主丛 $\phi:Q\rightarrow M$ 上的一个主丛联络可用于将 $TQ$ 分解为水平与垂直子丛,一个离散联络可用于将 $Q\times Q$ 分解为水平与垂直子流形。所有离散联络都通过称为李(或导数)函子的过程,在同一主丛上诱导出一个联络。积分问题旨在描述:对于给定的主丛联络 $\mathcal{A}$,所有其关联联络为 $\mathcal{A}$ 的离散联络的集合。我们的第一个结果是:对于平坦主丛联络,积分问题在平坦离散联络中具有唯一解。更广泛地,在主丛 $\phi$ 的结构群 $G$ 满足一个相当温和的条件下,我们证明了积分问题的存在性部分有解,但该解不必唯一。最后,我们看到,当 $G$ 为交换群时,给定相容的连续与离散曲率,积分问题具有由这些曲率约束的唯一解。

英文摘要:

In this paper we introduce the Integration Problem for principal connections. Just as a principal connection on a principal bundle $ϕ:Q\rightarrow M$ may be used to split $TQ$ into horizontal and vertical subbundles, a discrete connection may be used to split $Q\times Q$ into horizontal and vertical submanifolds. All discrete connections induce a connection on the same principal bundle via a process known as the Lie or derivative functor. The Integration Problem consists of describing, for a principal connection $\mathcal{A}$, the set of all discrete connections whose associated connection is $\mathcal{A}$. Our first result is that for \emph{flat} principal connections, the Integration Problem has a unique solution among the \emph{flat} discrete connections. More broadly, under a fairly mild condition on the structure group $G$ of the principal bundle $ϕ$, we prove that the existence part of the Integration Problem has a solution that needs not be unique. Last, we see that, when $G$ is abelian, given compatible continuous and discrete curvatures the Integration Problem has a unique solution constrained by those curvatures.

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。

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