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arXiv 2005.07789math.PR
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多重随机积分守恒流的极限定理

Limit Theorems for Conservative Flows on Multiple Stochastic Integrals

Shuyang Bai

摘要:

考虑由多重随机积分和无穷测度保守动力系统构成的平稳序列$(X_n)$。定义多重积分的随机测度是非高斯的、无限可分的并且具有有限方差。对动力系统的一些附加假设产生了量化系统保守性的参数$β\in(0,1)$。该参数$β$与积分阶数一起确定了$(X_n)$协方差的衰减率。本文的目的是建立$(X_n)$的部分和过程的极限定理。当协方差衰减足够快时,得到了以布朗运动为极限的中心极限定理;当协方差衰减足够慢时,得到了以分数阶布朗运动或Rosenblatt过程为极限的非中心极限定理.

英文摘要:

We consider a stationary sequence $(X_n)$ constructed by a multiple stochastic integral and an infinite-measure conservative dynamical system. The random measure defining the multiple integral is non-Gaussian, infinitely divisible and has a finite variance. Some additional assumptions on the dynamical system give rise to a parameter $β\in(0,1)$ quantifying the conservativity of the system. This parameter $β$ together with the order of the integral determines the decay rate of the covariance of $(X_n)$. The goal of the paper is to establish limit theorems for the partial sum process of $(X_n)$. We obtain a central limit theorem with Brownian motion as limit when the covariance decays fast enough, as well as a non-central limit theorem with fractional Brownian motion or Rosenblatt process as limit when the covariance decays slow enough.

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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