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arXiv 2109.13619math.PR
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标准和分数阶反射Ornstein-Uhlenbeck过程作为Cox-Ingersoll-Ross过程平方根的极限

Standard and fractional reflected Ornstein-Uhlenbeck processes as the limits of square roots of Cox-Ingersoll-Ross processes

Yuliya Mishura, Anton Yurchenko-Tytarenko

摘要:

本文利用$H>\frac{1}{2}$建立了Cox-Ingersoll-Ross(CIR)模型和反射Ornstein-Uhlenbeck(ROU)模型之间的一种新的联系.我们证明,概率为1,CIR过程的平方根一致收敛于紧凑的ROU过程的均值回归参数往往要么$σ^2/4$(在标准情况下)或$0$(在分数的情况下)。这也允许获得一个新的代表性的反射功能的ROU的积分泛函的CIR过程的限制。仿真结果说明了本文的结果。

英文摘要:

In this paper, we establish a new connection between Cox-Ingersoll-Ross (CIR) and reflected Ornstein-Uhlenbeck (ROU) models driven by either a standard Wiener process or a fractional Brownian motion with $H>\frac{1}{2}$. We prove that, with probability 1, the square root of the CIR process converges uniformly on compacts to the ROU process as the mean reversion parameter tends to either $σ^2/4$ (in the standard case) or to $0$ (in the fractional case). This also allows to obtain a new representation of the reflection function of the ROU as the limit of integral functionals of the CIR processes. The results of the paper are illustrated by simulations.

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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