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arXiv 1503.05322math.PR
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具有无界扩散的Infinite dimensional Ornstein-Uhlenbeck过程-逼近、二次变差和伊藤公式

Infinite dimensional Ornstein-Uhlenbeck processes with unbounded diffusion - Approximation, quadratic variation, and Itô formula

John Karlsson, Jörg-Uwe Löbus

摘要:

研究了经典Wiener空间上的一类Ornstein-Uhlenbeck过程.这些过程与扩散型Dirichlet形式相关联,其相应的扩散算子在Cameron-Martin空间中是无界的。证明了某些有限维Ornstein-Uhlenbeck过程的分布弱收敛于无限维Ornstein-Uhlenbeck过程的分布。对于无穷维过程,计算了普通标量二次变分。此外,相对于正则化的随机分析,本文还导出了标量和张量二次变分。一个相关的伊藤公式。

英文摘要:

The paper studies a class of Ornstein-Uhlenbeck processes on the classical Wiener space. These processes are associated with a diffusion type Dirichlet form whose corresponding diffusion operator is unbounded in the Cameron-Martin space. It is shown that the distributions of certain finite dimensional Ornstein-Uhlenbeck processes converge weakly to the distribution of such an infinite dimensional Ornstein-Uhlenbeck process. For the infinite dimensional processes, the ordinary scalar quadratic variation is calculated. Moreover, relative to the stochastic calculus via regularization, the scalar as well as the tensor quadratic variation are derived. A related Itô formula is presented.

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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