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arXiv 1504.05079math.PR
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关于自由分式Wishart过程

On the Free Fractional Wishart Process

Juan Carlos Pardo, José Luis Pérez, Victor Pérez-Abreu

摘要:

本文研究了N=B*B的分式Wishart过程的特征值过程,其中B是Nualart和Pérez-Abreu最近研究的矩阵分式布朗运动.使用随机分析相对于杨积分,我们表明,本征值不碰撞在任何时候的概率1。当矩阵过程B的元素由独立的分数布朗运动给出,且Hurst参数为$H\in(1/2,1)$时,我们得到了一个关于相应分数Wishart过程特征值的Malliavin演算意义下的随机微分方程.最后得到了分数阶Wishart过程特征值的经验测度过程的泛函极限定理。极限的特征在于,并被称为自由分数Wishart过程,它构成了家庭的分数膨胀的自由泊松分布。

英文摘要:

We investigate the process of eigenvalues of a fractional Wishart process defined as N=B*B, where B is a matrix fractional Brownian motion recently studied by Nualart and Pérez-Abreu. Using stochastic calculus with respect to the Young integral we show that the eigenvalues do not collide at any time with probability one. When the matrix process B has entries given by independent fractional Brownian motions with Hurst parameter $H\in(1/2,1)$ we derive a stochastic differential equation in a Malliavin calculus sense for the eigenvalues of the corresponding fractional Wishart process. Finally a functional limit theorem for the empirical measure-valued process of eigenvalues of a fractional Wishart process is obtained. The limit is characterized and referred to as the free fractional Wishart process which constitutes the family of fractional dilations of the free Poisson distribution.

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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