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arXiv 1302.2116math.PR
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可交换随机测度

Exchangeable random measures

Tim Austin

摘要:

设A是标准Borel空间,考虑A值数组空间A^{ \bbN^{(k)} },该空间由\bbN的所有大小为k的子集索引。本文研究了在\bbN置换的自然作用下其律不变的随机测度。主要的结果是一个表示定理,这种“可交换的”随机措施,获得使用的经典表示定理可交换阵列由于德Finetti,胡佛,奥尔德斯和Kallenberg。在证明了这个表示之后,给出了可交换随机测度的两个应用。第一个是一个简短的新证明的Dovbysh-Sudakov表示定理的可交换PSD矩阵。第二个是在制定一个自然类的限制对象的稀释平均场自旋玻璃模型,保留更多的信息,而不仅仅是限制Gram-de Finetti矩阵的研究中使用的谢灵顿-柯克帕特里克模型。

英文摘要:

Let A be a standard Borel space, and consider the space A^{\bbN^{(k)}} of A-valued arrays indexed by all size-k subsets of \bbN. This paper concerns random measures on such a space whose laws are invariant under the natural action of permutations of \bbN. The main result is a representation theorem for such `exchangeable' random measures, obtained using the classical representation theorems for exchangeable arrays due to de Finetti, Hoover, Aldous and Kallenberg. After proving this representation, two applications of exchangeable random measures are given. The first is a short new proof of the Dovbysh-Sudakov Representation Theorem for exchangeable PSD matrices. The second is in the formulation of a natural class of limit objects for dilute mean-field spin glass models, retaining more information than just the limiting Gram-de Finetti matrix used in the study of the Sherrington-Kirkpatrick model.

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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