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arXiv 0812.4414math.PR
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一类随机场的Martingale-Cobounce表示

Martingale-Coboundary Representation for a Class of Random Fields

Mikhail Gordin

摘要:

一个平稳随机序列在某些假设下允许一个表示为另外两个的和:其中一个是鞅差序列,另一个是所谓的上边界。这种表示可用于利用鞅逼近证明某些极限定理。本文针对由几个可交换的不可逆概率保持变换生成的一类随机场提出了这种分解的多元版本。在这种表示中,出现了混合型和数,它们相对于参数空间的某组方向表现为反向多参数鞅差(在几个已知定义之一的意义上),而它们相对于其他方向看起来是上边界。应用到极限定理将发表在其他地方。

英文摘要:

A stationary random sequence admits under some assumptions a representation as the sum of two others: one of them is a martingale difference sequence, and another is a so-called coboundary. Such a representation can be used for proving some limit theorems by means of the martingale approximation. A multivariate version of such a decomposition is presented in the paper for a class of random fields generated by several commuting non-invertible probability preserving transformations. In this representation summands of mixed type appear which behave with respect to some groupof directions of the parameter space as reversed multiparameter martingale differences (in the sense of one of several known definitions) while they look as coboundaries relative to the other directions. Applications to limit theorems will be published elsewhere.

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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