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arXiv 1602.01613math.PR
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广义Pickands常数与平稳极大稳定过程

Generalized Pickands constants and stationary max-stable processes

Krzysztof Dębicki, Sebastian Engelke, Enkelejd Hashorva

摘要:

Pickands常数在高斯过程的渐近理论中起着至关重要的作用。它们通常被定义为包含分数布朗运动的期望序列的极限,因此,它们的确切值通常是未知的。最近,Dieker和Yakir(2014)推导出了Pickands常数的一种新表示,即不涉及极限运算的简单期望值。本文证明了Pickands常数及其相应的Dieker-Yakir表示的概念可以推广到一大类随机过程,包括一般的高斯过程和Lévy过程。此外,我们提供了一个链接到空间极值理论,并表明,皮卡德型常数相吻合的最大稳定的过程与混合移动最大值表示的研究中产生的某些常数。

英文摘要:

Pickands constants play a crucial role in the asymptotic theory of Gaussian processes. They are commonly defined as the limits of a sequence of expectations involving fractional Brownian motions and, as such, their exact value is often unknown. Recently, Dieker and Yakir (2014) derived a novel representation of Pickands constant as a simple expected value that does not involve a limit operation. In this paper we show that the notion of Pickands constants and their corresponding Dieker-Yakir representations can be extended to a large class of stochastic processes, including general Gaussian and Lévy processes. We furthermore provide a link to spatial extreme value theory and show that Pickands-type constants coincide with certain constants arising in the study of max-stable processes with mixed moving maxima representations.

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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