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arXiv · 1310.7993

$(K,N)$-convexity and the curvature-dimension condition for negative $N$

Shin-ichi Ohta
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Abstract

We extend the range of $N$ to negative values in the $(K,N)$-convexity (in the sense of Erbar--Kuwada--Sturm), the weighted Ricci curvature $Ric_N$ and the curvature-dimension condition $CD(K,N)$. We generalize a number of results in the case of $N>0$ to this setting, including Bochner's inequality, the Brunn--Minkowski inequality and the equivalence between $Ric_N \ge K$ and $CD(K,N)$. We also show an expansion bound for gradient flows of Lipschitz $(K,N)$-convex functions.

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Shin-ichi Ohta. 2013-10-30. $(K,N)$-convexity and the curvature-dimension condition for negative $N$. https://arxiv.org/abs/1310.7993

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