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arXiv 2602.16615math.PR
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粗糙路径上的功能性布雷尔-马约尔定理

A Rough Functional Breuer-Major Theorem

Henri Elad Altman, Tom Klose, Nicolas Perkowski

AI总结:

本文将功能性布雷尔-马约尔定理扩展到粗糙路径空间,通过定制的Slutsky引理和组合分析,证明了有限维分布的收敛性及修正项的计算。

摘要:

我们扩展了Nourdin和Nualart(2020)提出的功能性布雷尔-马约尔定理,将其推广到粗糙路径空间。证明紧性部分结合了Furlan和Gubinelli(2019)为迭代马尔可夫分歧所发展的乘法公式,以及Meyer不等式和Chevyrev等人(2022)为cadlag粗糙路径的r-变差所发展的 Kolmogorov 类型准则。由于鞅技术不适用,我们通过定制版本的Slutsky引理获得有限维分布的收敛性:首先,我们通过迭代积分-分部方案克服超收缩性的缺乏,将剩余分析减少到有限的维纳混沌;关键的是,这一论证依赖于非线性性的马尔可夫可微性,而不是混沌衰减,并因此涵盖了中心绝对值函数。其次,受大数定律精神,我们证明二次过程的对角线收敛到一个显式的对称修正项。最后,我们计算了剩余过程的所有矩,并通过精细的组合分析证明它们收敛到Stratonovich布朗路径扰动的矩,该路径由Fawcett定理的适当修正计算得出。所有这些步骤都受益于由布雷尔和马约尔(1983)原始论证所隐含的主要组合简化。

英文摘要:

We extend the functional Breuer-Major theorem by Nourdin and Nualart (2020) to the space of rough paths. The proof of tightness combines the multiplication formula for iterated Malliavin divergences, due to Furlan and Gubinelli (2019), with Meyer's inequality and a Kolmogorov-type criterion for the r-variation of cadlag rough paths, due to Chevyrev et al. (2022). Since martingale techniques do not apply, we obtain the convergence of the finite-dimensional distributions through a bespoke version of Slutsky's lemma: First, we overcome the lack of hypercontractivity by an iterated integration-by-parts scheme which reduces the remaining analysis to finite Wiener chaos; crucially, this argument relies on Malliavin differentiability of the nonlinearity but not on chaos decay and, as a consequence, encompasses the centred absolute value function. Second, in the spirit of the law of large numbers, we show that the diagonal of the second-order process converges to an explicit symmetric correction term. Finally, we compute all the moments of the remaining process and, through a fine combinatorial analysis, show that they converge to those of the Stratonovich Brownian rough path perturbed by an antisymmetric area correction, as computed by a suitable amendment of Fawcett's theorem. All of these steps benefit from a major combinatorial reduction that is implied by the original argument of Breuer and Major (1983).

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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