Abstract
We show that the geodesic flows of a sub-Riemannian metric and that of a Riemannian extension commute if and only if the extended metric is parallel with respect to a certain connection. This result allows us to describe the sub-Riemannian geodesic flow on totally geodesic Riemannian foliations in terms of the Riemannian geodesic flow. Also, given a submersion \(\pi :M \rightarrow B\), we describe when the projections of a Riemannian and a sub-Riemannian geodesic flow in M coincide.
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Acknowledgments
We thank Dr. Petri Kokkonen for helpful discussions and comments. The first author is partially supported by the grant Anillo CONICYT PIA ACT 1415 of the Chilean Research Council and the grant DI16-6000 of the Research and Postgraduate Studies Unit of Universidad de La Frontera. The second author is supported by Fonds National de la Recherche Luxembourg (project Open O14/7628746 GEOMREV).
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Godoy Molina, M., Grong, E. Riemannian and Sub-Riemannian Geodesic Flows. J Geom Anal 27, 1260–1273 (2017). https://doi.org/10.1007/s12220-016-9717-8
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DOI: https://doi.org/10.1007/s12220-016-9717-8