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Mathematics > Differential Geometry

arXiv:2212.01652v1 (math)
[Submitted on 3 Dec 2022 (this version) , latest version 2 Sep 2024 (v2) ]

Title: Tangent groupoid and tangent cones in sub-Riemannian geometry

Title: 切丛与子黎曼几何中的切锥

Authors:Omar Mohsen
Abstract: Let $X_1,\cdots,X_m$ be vector fields satisfying H\"ormander's Lie bracket generating condition on a smooth manifold $M$. We generalise Connes's tangent groupoid, by constructing a completion of the space $M\times M\times \mathbb{R}_+^\times$ using the sub-Riemannian metric. We use our space to calculate all the tangent cones of the sub-Riemannian metric in the sense of the Gromov-Hausdorff distance. This generalises a result of Bella\"iche.
Abstract: 设$X_1,\cdots,X_m$为在光滑流形$M$上满足 Hörmander 的李括号生成条件的向量场。 我们通过利用次黎曼度量构造空间$M\times M\times \mathbb{R}_+^\times$的完成,从而推广了 Connes 的切丛群胚。 我们使用我们的空间,在 Gromov-Hausdorff 距离的意义下计算次黎曼度量的所有切锥。 这推广了 Bellaïche 的一个结果。
Subjects: Differential Geometry (math.DG) ; Metric Geometry (math.MG); Operator Algebras (math.OA)
Cite as: arXiv:2212.01652 [math.DG]
  (or arXiv:2212.01652v1 [math.DG] for this version)
  https://doi.org/10.48550/arXiv.2212.01652
arXiv-issued DOI via DataCite

Submission history

From: Omar Mohsen [view email]
[v1] Sat, 3 Dec 2022 17:03:49 UTC (40 KB)
[v2] Mon, 2 Sep 2024 18:12:31 UTC (42 KB)
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