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arXiv 1505.04166math.DG
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作为$M\times M$上函数的粗里奇曲率

Coarse Ricci curvature as a function on $M\times M$

Antonio Ache, Micah Warren

摘要:

我们使用Bakry和Emery在对数Sobolev不等式工作中所使用的框架来定义光滑度量测度空间上的粗里奇曲率的概念,以替代Y.奥利维尔对于任意曲线$γ(s).$,该函数可以通过公式$$ \mathrm{Ric}(γ^{\prime}\left( 0\right) ,γ^{\prime}\left( 0\right) )=\frac{1}{2}\frac{d^{2}}{ds^{2}}\mathrm{Ric}_{Δ_g}(x,γ\left( s\right) )$$来恢复光滑黎曼流形上的Ricci张量

英文摘要:

We use the framework used by Bakry and Emery in their work on logarithmic Sobolev inequalities to define a notion of coarse Ricci curvature on smooth metric measure spaces alternative to the notion proposed by Y. Ollivier. This function can be used to recover the Ricci tensor on smooth Riemannian manifolds by the formula $$ \mathrm{Ric}(γ^{\prime}\left( 0\right) ,γ^{\prime}\left( 0\right) )=\frac{1}{2}\frac{d^{2}}{ds^{2}}\mathrm{Ric}_{Δ_g}(x,γ\left( s\right) )$$ for any curve $γ(s).$

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