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arXiv 2407.01427math.DGmath.MGmath.OC
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全息丛上的丛型次黎曼结构

Bundle type sub-Riemannian structures on holonomy bundles

Eder M. Correa, Giovane Galindo, Lino Grama

AI总结:

本文通过结合轨道定理与 Ambrose-Singer 定理引入主丛上的可控主联络,估计主丛与约化齐性空间之间的 Gromov-Hausdorff 距离,并证明结构群约化可诱导度量序列收敛到正规约化齐性空间,从而借助拓扑不变量在模空间闭包中探测此类空间。

摘要:

在本文中,我们结合 Rashevsky-Chow-Sussmann(轨道)定理与 Ambrose-Singer 定理,引入了主 $G$-丛上可控主联络的概念。利用这一概念,在紧性的温和假设下,我们估计了主 $G$-丛与某些约化齐性 $G$-空间之间的 Gromov-Hausdorff 距离。此外,我们证明了结构群 $G$ 到闭连通子群的每一个约化都会在全空间上产生一列黎曼度量,使得相应的度量空间序列在 Gromov-Hausdorff 拓扑下收敛到一个正规约化齐性 $G$-空间。最后这一发现使得人们能够通过障碍理论提供的拓扑不变量,在该丛全空间的黎曼度量模空间的 Gromov-Hausdorff 闭包中探测某些约化齐性 $G$-空间的存在性。

英文摘要:

In this paper, combining the Rashevsky-Chow-Sussmann (orbit) theorem with the Ambrose-Singer theorem, we introduce the notion of controllable principal connections on principal $G$-bundles. Using this concept, under a mild assumption of compactness, we estimate the Gromov-Hausdorff distance between principal $G$-bundles and certain reductive homogeneous $G$-spaces. In addition, we prove that every reduction of the structure group $G$ to a closed connected subgroup gives rise to a sequence of Riemannian metrics on the total space for which the underlying sequence of metric spaces converges, in the Gromov-Housdorff topology, to a normal reductive homogeneous $G$-space. This last finding allows one to detect the presence of certain reductive homogeneous $G$-spaces in the Gromov-Housdorff closure of the moduli space of Riemannian metrics of the total space of the bundle through topological invariants provided by obstruction theory.

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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