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arXiv 2004.08909math.STstat.TH
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结构统计的应用:指数族的几何推断

Applications of Structural Statistics: Geometric Inference in Exponential Families

Patrick Michl

摘要:

指数族包括一大类统计模型和参数族,如正态分布、二项分布、Γ分布或指数分布。因此,它的概率分布的形式表示诱导一个有限的内在结构,这似乎是一个双平坦的统计流形。相反,可以证明,任何由正则Bregman发散给出的对偶平坦统计流形唯一地诱导出正则指数族,使得指数族可以-在某些限制下-被视为对偶平坦统计流形的普适表示。本文从结构分层学的角度,对甘利俊一关于指数族的内禀结构的开创性工作进行了评述。

英文摘要:

Exponential families comprise a broad class of statistical models and parametric families like normal distributions, binomial distributions, gamma distributions or exponential distributions. Thereby the formal representation of its probability distributions induces a confined intrinsic structure, which appears to be that of a dually flat statistical manifold. Conversely it can be shown, that any dually flat statistical manifold, which is given by a regular Bregman divergence uniquely induced a regular exponential family, such that exponential families may - with some restrictions - be regarded as a universal representation of dually flat statistical manifolds. This article reviews the pioneering work of Shun'ichi Amari about the intrinsic structure of exponential families in terms of structural stratistics.

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