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arXiv math/0108081math.PRmath.DS
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从一维边际构造平稳随机过程

Building a Stationary Stochastic Process From a Finite-dimensional Marginal

Marcus Pivato

摘要:

如果A是一个有限字母表,Z^D是一个D维格,U是Z^D的一个子集,mu_U是A^U上的一个概率测度,它"看起来“像是一个平稳随机场在A^(Z^D)上的边缘投影,那么我们能”扩展“mu_U到这样一个场吗?在什么条件下,我们可以使这个扩展遍历,(拟)周期,或(弱)混合?在考察了经典的关于D = 1时的问题的工作之后,我们给出了mu_U对D > 1可扩张的一些充分条件和一些必要条件,并证明了一般情况下,该问题是不可形式判定的.

英文摘要:

If A is a finite alphabet, Z^D is a D-dimensional lattice, U is a subset of Z^D, and mu_U is a probability measure on A^U that ``looks like'' the marginal projection of a stationary random field on A^(Z^D), then can we ``extend'' mu_U to such a field? Under what conditions can we make this extension ergodic, (quasi)periodic, or (weakly) mixing? After surveying classical work on this problem when D = 1, we provide some sufficient conditions and some necessary conditions for mu_U to be extendible for D > 1, and show that, in general, the problem is not formally decidable.

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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