A hierarchical version of the de Finetti and Aldous-Hoover representations

A hierarchical version of the de Finetti and Aldous-Hoover representations
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de Finetti 和 Aldous-Hoover 表示的分层版本

DOI:
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发表时间:
2013
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影响因子:
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通讯作者:
D. Panchenko
D. Panchenko
中科院分区:
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文献类型:
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作者:
Tim Austin;D. Panchenko

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我们考虑随机数组索引的叶子的无限根树的有限深度,与分布不变的重排下,保持树结构。我们呼吁这样的数组层次可交换的,并证明他们满足一个模拟的de Finetti定理。我们还证明了一个更一般的结果,数组索引的几棵树,其中包括层次版本的Aldous-Hoover表示。
We consider random arrays indexed by the leaves of an infinitary rooted tree of finite depth, with the distribution invariant under the rearrangements that preserve the tree structure. We call such arrays hierarchically exchangeable and prove that they satisfy an analogue of de Finetti’s theorem. We also prove a more general result for arrays indexed by several trees, which includes a hierarchical version of the Aldous-Hoover representation.