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arXiv 2103.09187math.PR
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k阶分数Skellam过程

Fractional Skellam Process of Order $k$

K. K. Kataria, M. Khandakar

AI总结:

本文引入k阶分数Skellam过程,通过逆稳定从属过程时间变换构造,推导其分布、分数阶微分方程及统计性质,并证明其长程依赖性,进一步研究两种时间变换版本。

摘要:

我们引入并研究了一种k阶Skellam过程的分数版本,通过用一个独立的逆稳定从属过程对其进行时间变换。我们称之为k阶分数Skellam过程(FSPoK)。我们得到了其一维分布的积分表示及其所满足的分数阶微分方程组。我们推导了FSPoK的概率生成函数、均值、方差和协方差,并利用这些结果建立了其长程依赖性质。随后,我们考虑了FSPoK的两种时间变换版本。这些版本是通过用一个独立的Lévy从属过程及其逆过程对FSPoK进行时间变换得到的。我们讨论了这些时间变换过程的一些分布性质及特殊情形。

英文摘要:

We introduce and study a fractional version of the Skellam process of order $k$ by time-changing it with an independent inverse stable subordinator. We call it the fractional Skellam process of order $k$ (FSPoK). An integral representation for its one-dimensional distributions and their governing system of fractional differential equations are obtained. We derive the probability generating function, mean, variance and covariance of the FSPoK which are utilized to establish its long-range dependence property. Later, we considered two time-changed versions of the FSPoK. These are obtained by time-changing the FSPoK by an independent Lévy subordinator and its inverse. Some distributional properties and particular cases are discussed for these time-changed processes.

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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