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arXiv 1906.09103math.DGmath.PRmath.STstat.TH
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对数发散:曲率的几何学和解释

Logarithmic divergences: geometry and interpretation of curvature

Ting-Kam Leonard Wong, Jiaowen Yang

摘要:

我们研究了对数$L^{(α)}$发散外推的Bregman发散,并对应于新的最优输运问题的解决方案。我们表明,这个对数的分歧是相当于一个保角变换的Bregman分歧,并通过一个明确的仿射浸入,是相当于黑濑的几何分歧。特别地,$L^{(α)}$ -发散是具有恒定截面曲率$-α$的统计流形的正则发散。对于这样一个流形,我们给出了一个几何解释,其截面曲率的一对原始和对偶测地线之间的分歧如何不同于对偶平坦的情况。进一步的结果可以在我们的后续论文[27]中找到,该论文揭示了最优输运和信息几何之间的新关系。

英文摘要:

We study the logarithmic $L^{(α)}$-divergence which extrapolates the Bregman divergence and corresponds to solutions to novel optimal transport problems. We show that this logarithmic divergence is equivalent to a conformal transformation of the Bregman divergence, and, via an explicit affine immersion, is equivalent to Kurose's geometric divergence. In particular, the $L^{(α)}$-divergence is a canonical divergence of a statistical manifold with constant sectional curvature $-α$. For such a manifold, we give a geometric interpretation of its sectional curvature in terms of how the divergence between a pair of primal and dual geodesics differ from the dually flat case. Further results can be found in our follow-up paper [27] which uncovers a novel relation between optimal transport and information geometry.

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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