arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1903.06110math.STmath.AGstat.TH
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离散统计模型的有理极大似然估计

Discrete Statistical Models with Rational Maximum Likelihood Estimator

Eliana Duarte, Orlando Marigliano, Bernd Sturmfels

摘要:

离散统计模型是概率单纯形的子集。它的最大似然估计(MLE)是从单纯形到模型的收缩。我们刻画了所有的模型,这种回缩是一个有理函数。这是一个贡献,通过真正的代数几何取决于结果由于Huh和Kapranov霍恩均匀化。我们提出了一个算法,合理的MLE构建模型,我们证明了它的一系列实例。我们的重点在于统计学家熟悉的模型,如贝叶斯网络,可分解的图形模型和阶段树。

英文摘要:

A discrete statistical model is a subset of a probability simplex. Its maximum likelihood estimator (MLE) is a retraction from that simplex onto the model. We characterize all models for which this retraction is a rational function. This is a contribution via real algebraic geometry which rests on results due to Huh and Kapranov on Horn uniformization. We present an algorithm for constructing models with rational MLE, and we demonstrate it on a range of instances. Our focus lies on models familiar to statisticians, like Bayesian networks, decomposable graphical models, and staged trees.

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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