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arXiv 0706.4441math.DGmath.APmath.MG
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自由$n$ -分布:完整性、次黎曼结构、费曼构造和对偶分布

Free $n$-distributions: holonomy, sub-Riemannian structures, Fefferman constructions and dual distributions

Stuart Armstrong

摘要:

本文分析了由流形的切空间中的自由$n$ -分布生成的抛物几何。它表明,某些holonomy减少相关的正常拖拉机连接,意味着首选的连接与特殊性质,以及黎曼或亚黎曼结构的流形上。它在最简单的情况下构造了这些完整性约简的例子。然而,主要结果在于自由3-分布。在这些情况下,CR上的正规February man结构和拉格朗日切触结构分别对应于SO(4,2)和SO(3,3)的完整约化。还有一个迷人的建设“双”分布时,holonomy减少到$G_2'$。

英文摘要:

This paper analyses the parabolic geometries generated by a free $n$-distribution in the tangent space of a manifold. It shows that certain holonomy reductions of the associated normal Tractor connections, imply preferred connections with special properties, along with Riemannian or sub-Riemannian structures on the manifold. It constructs examples of these holonomy reductions in the simplest cases. The main results, however, lie in the free 3-distributions. In these cases, there are normal Fefferman constructions over CR and Lagrangian contact structures corresponding to holonomy reductions to SO(4,2) and SO(3,3), respectively. There is also a fascinating construction of a `dual' distribution when the holonomy reduces to $G_2'$.

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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