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arXiv 2304.03319math.PR
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一类具有重尾的长程相依过程的联合和-最大值极限

Joint sum-max limit for a class of long-range dependent processes with heavy tails

Shuyang Bai, He Tang

AI总结:

本文研究一类同时具有长程相依和重尾特性的平稳过程,建立了其联合和-最大值极限定理,并分别揭示了有限方差与无限方差情况下极限分量的独立或相依结构。

摘要:

我们考虑一类同时表现出长程相依性和重尾的平稳过程。文献中最近已经分别建立了关于和与极值的极限定理,并在极限中出现了新的对象。在本文中,我们为这类过程建立了联合和-最大值极限定理。在有限方差情况下,极限由两个独立的部分组成:由和产生的分数布朗运动,以及由最大值产生的长程相依随机上测度。在无限方差情况下,我们在极限中获得了两个相依的部分:一个稳定过程和一个随机上测度,其相依结构通过稳定从属过程的局部时间与变程来描述。为了建立后一种情况下的极限定理,我们还开发了从属过程局部时间与变程的联合收敛结果,这可能具有独立的意义。

英文摘要:

We consider a class of stationary processes exhibiting both long-range dependence and heavy tails. Separate limit theorems for sums and for extremes have been established recently in literature with novel objects appearing in the limits. In this article, we establish the joint sum-max limit theorems for this class of processes. In the finite-variance case, the limit consists of two independent components: a fractional Brownian motion arising from the sum, and a long-range dependent random sup measure arising from the maximum. In the infinite-variance case, we obtain in the limit two dependent components: a stable process and a random sup measure whose dependence structure is described through the local time and range of a stable subordinator. For establishing the limit theorem in the latter case, we also develop a joint convergence result for the local time and range of subordinators, which may be of independent interest.

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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