Ricci Bounds for Euclidean and Spherical Cones

Kathrin Bacher and Karl-Theodor Sturm ()
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Kathrin Bacher: Rheinische Friedrich-Wilhelms-Universität Bonn, Institut für Angewandte Mathematik
Karl-Theodor Sturm: Rheinische Friedrich-Wilhelms-Universität Bonn, Institut für Angewandte Mathematik

A chapter in Singular Phenomena and Scaling in Mathematical Models, 2014, pp 3-23 from Springer

Abstract: Abstract We prove generalized lower Ricci bounds for Euclidean and spherical cones over complete Riemannian manifolds. These cones are regarded as complete metric measure spaces. In general, they will be neither manifolds nor Alexandrov spaces. We show that the Euclidean cone over an n-dimensional Riemannian manifold whose Ricci curvature is bounded from below by n − 1 satisfies the curvature-dimension condition CD(0, n + 1) and that the spherical cone over the same manifold fulfills the curvature-dimension condition CD(n, n + 1). More generally, for each N > 1 we prove that the condition CD(N − 1, N) for a weighted Riemannian space is equivalent to the condition CD(0, N + 1) for its N-Euclidean cone as well as to the condition CD(N, N + 1) for its N-spherical cone.

Keywords: Riemannian Manifold; Measure Space; Ricci Curvature; Complete Riemannian Manifold; Optimal Transport (search for similar items in EconPapers)
Date: 2014
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Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-3-319-00786-1_1

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DOI: 10.1007/978-3-319-00786-1_1

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