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arXiv 2003.05479math.STstat.TH
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一维位置-尺度模型中的Wasserstein统计量

Wasserstein statistics in 1D location-scale model

Shun-ichi Amari

摘要:

Wasserstein几何和信息几何是引入概率分布流形的两种重要结构。前者是利用两个分布之间的运输费用定义的,因此它反映了定义分布的基流形的度量结构。信息几何是基于几何在底空间的可逆变换下不变的不变性准则而构造的。两者都有各自的应用价值。统计推断是建立在信息几何上的,其中Fisher度量起着基础性的作用,而Wasserstein几何对于计算机视觉和AI的应用是有用的。在底空间为1维的情况下,提出了基于Wasserstein几何的统计推断.利用位置-尺度模型,我们显式地导出了$W$ -估计量,并研究了它的渐近性质。

英文摘要:

Wasserstein geometry and information geometry are two important structures introduced in a manifold of probability distributions. The former is defined by using the transportation cost between two distributions, so it reflects the metric structure of the base manifold on which distributions are defined. Information geometry is constructed based on the invariance criterion that the geometry is invariant under reversible transformations of the base space. Both have their own merits for applications. Statistical inference is constructed on information geometry, where the Fisher metric plays a fundamental role, whereas Wasserstein geometry is useful for applications to computer vision and AI. We propose statistical inference based on the Wasserstein geometry in the case that the base space is 1-dimensional. By using the location-scale model, we derive the $W$-estimator explicitly and studies its asymptotic behaviors.

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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