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arXiv 1707.01889math.PRmath.FA
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任意维Poisson空间上的四阶矩定理

Fourth moment theorems on the Poisson space in any dimension

Christian Döbler, Anna Vidotto, Guangqu Zheng

摘要:

我们推广到任何维的定量四阶矩定理的泊松设置,最近证明的C。Döbler和G. Peccati(2017).特别地,通过采用I. Nourdin和G. Zheng(2017)到Poisson框架,我们在有限四阶矩的最弱可能假设下证明了我们的结果。这产生了一个Peccati-Tudor型定理,以及在单变量情况下的最优改进。最后,导出了与齐次多线性和的普适性现象密切相关的“从Poisson到Gaussian”的转换原理。

英文摘要:

We extend to any dimension the quantitative fourth moment theorem on the Poisson setting, recently proved by C. Döbler and G. Peccati (2017). In particular, by adapting the exchangeable pairs couplings construction introduced by I. Nourdin and G. Zheng (2017) to the Poisson framework, we prove our results under the weakest possible assumption of finite fourth moments. This yields a Peccati-Tudor type theorem, as well as an optimal improvement in the univariate case. Finally, a transfer principle "from-Poisson-to-Gaussian" is derived, which is closely related to the universality phenomenon for homogeneous multilinear sums.

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