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北美退伍军人节(Veterans Day),12 日无更新
arXiv 2004.01863math.DGmath.FAmath.PR
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基于广义Gamma $z$演算的次黎曼里奇曲率

Sub-Riemannian Ricci curvature via generalized Gamma $z$ calculus

Qi Feng, Wuchen Li

摘要:

本文导出了次黎曼流形的次黎曼里奇曲率张量。我们提供的例子包括海森堡群,位移群,和Martinet次黎曼结构与任意加权体积,在其中,我们建立了分析界的次黎曼曲率维数的界限和log-Sobolev不等式。{这些界可以用来建立紧空间域上亚黎曼漂移扩散过程的熵耗散结果,用$L_1$距离表示。}我们推导里奇曲率是基于广义Gamma $z$演算和$z$ -Bochner公式,其中$z$表示引入到亚黎曼简并结构中的额外方向.

英文摘要:

We derive sub-Riemannian Ricci curvature tensor for sub-Riemannian manifolds. We provide examples including the Heisenberg group, displacement group, and Martinet sub-Riemannian structure with arbitrary weighted volumes, in which we establish analytical bounds for sub-Riemannian curvature dimension bounds and log-Sobolev inequalities. {These bounds can be used to establish the entropy dissipation results for sub-Riemannian drift diffusion processes on a compact spatial domain, in term of $L_1$ distance.} Our derivation of Ricci curvature is based on generalized Gamma $z$ calculus and $z$--Bochner's formula, where $z$ stands for extra directions introduced into the sub-Riemannian degenerate structure.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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