Calculus of Variations and Geometric Measure Theory
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A. Agrachev - D. Barilari - L. Rizzi

Sub-Riemannian curvature in contact geometry

created by rizzi1 on 17 May 2015
modified by barilari on 08 Oct 2016

[BibTeX]

Published Paper

Inserted: 17 may 2015
Last Updated: 8 oct 2016

Journal: Journal of Geometric Analysis
Year: 2015
Doi: 10.1007/s12220-016-9684-0

Abstract:

We compare different notions of curvature on contact sub-Riemannian manifolds. In particular we introduce canonical curvatures as the coefficients of the sub-Riemannian Jacobi equation. The main result is that all these coefficients are encoded in the asymptotic expansion of the horizontal derivatives of the sub-Riemannian distance. We explicitly compute their expressions in terms of the standard tensors of contact geometry. As an application of these results, we obtain a sub-Riemannian version of the Bonnet-Myers theorem that applies to any contact manifold.

Keywords: Curvature, sub-Riemannian, contact, comparison


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