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CD meets CAT

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arxiv 1712.02839 v3 pith:3VFNFNZN submitted 2017-12-07 math.DG math.MG

classification math.DGmath.MG
keywords boundedcurvaturekappaspaceabovealexandrovthenbelow
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abstract

We show that if a noncollapsed $CD(K,n)$ space $X$ with $n\ge 2$ has curvature bounded above by $\kappa$ in the sense of Alexandrov then $K\le (n-1)\kappa$ and $X$ is an Alexandrov space of curvature bounded below by $K-\kappa (n-2)$. We also show that if a $CD(K,n)$ space $Y$ with finite $n$ has curvature bounded above then it is infinitesimally Hilbertian.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. On the structure of RCD spaces with upper curvature bounds

    math.DG 2019-08 accept novelty 8.0 of 10

    Every RCD space with curvature bounded above is a topological manifold with boundary whose interior is the regular set, a smooth geodesically convex manifold.

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