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arXiv 2010.07752math.PR
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随机过程的一个密度性质

A density property for stochastic processes

Riccardo Passeggeri

摘要:

考虑一类概率分布,对于每个$d\in\mathbb{N}$,它在$\mathbb{R}^{d}$上的所有概率分布的空间中关于弱收敛是稠密的。然后,我们构造了各种显式的连续(cádlág)过程类,它们在所有连续(cádlág)过程的空间中关于分布依分布收敛是稠密的。这是由最近的结果,即准无限可分(QID)的分布是密集的,当$d=1$。如果把这个结果推广到任何$d\in\mathbb{N}$,那么我们的结果将意味着QID过程在连续和cádlág过程空间都是稠密的。

英文摘要:

Consider a class of probability distributions which is dense in the space of all probability distributions on $\mathbb{R}^{d}$ with respect to weak convergence, for every $d\in\mathbb{N}$. Then, we construct various explicit classes of continuous (cádlág) processes which are dense in the space of all continuous (cádlág) processes with respect to convergence in distribution. This is motivated by the recent result that quasi-infinitely divisible (QID) distributions are dense when $d=1$. If this result is extended to any $d\in\mathbb{N}$, then our result will imply that QID processes are dense in both spaces of continuous and cádlág 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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