Testing Unfaithful Gaussian Graphical Models
Testing Unfaithful Gaussian Graphical Models
复制标题
测试不忠实的高斯图形模型
DOI:
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发表时间:
2014
期刊:
影响因子:
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通讯作者:
S. Tatikonda
中科院分区:
文献类型:
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作者:
D. Soh;S. Tatikonda
The global Markov property for Gaussian graphical models ensures graph separation implies conditional independence. Specifically if a node set S graph separates nodes u and v then Xu is conditionally independent of Xv given XS. The opposite direction need not be true, that is, Xu ⊥ Xv | XS need not imply S is a node separator of u and v. When it does, the relation Xu ⊥ Xv | XS is called faithful. In this paper we provide a characterization of faithful relations and then provide an algorithm to test faithfulness based only on knowledge of other conditional relations of the form Xi ⊥ Xj | XS.