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arXiv 1306.6099math.FAmath.OAmath.PR
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群测度空间的Poincaré型不等式及相关的运输费用不等式

Poincaré type inequalities for group measure spaces and related transportation cost inequalities

Qiang Zeng

摘要:

设$G$是实希尔伯特空间$H$上具有正交表示$α$的可数离散群.证明了群测度空间$L_\infty(Ω_H,γ)\rtimes G$的$L_p$ Poincaré不等式,其中群作用和高斯测度空间$(Ω_H, γ)$都与表示$α$有关.证明的思想来源于Pisier关于里斯变换有界性的方法和Lust-Piquard关于自旋系统的工作。然后在一般的非对易情形下,由$L_p$ Poincaré不等式导出一个运输型不等式.这个不等式是尖锐的常数(在高斯设置)。给出了几个应用,包括Wiener/Rademacher混沌估计和Rieffel紧量子度量空间的新例子。

英文摘要:

Let $G$ be a countable discrete group with an orthogonal representation $α$ on a real Hilbert space $H$. We prove $L_p$ Poincaré inequalities for the group measure space $L_\infty(Ω_H,γ)\rtimes G$, where both the group action and the Gaussian measure space $(Ω_H, γ)$ are associated with the representation $α$. The idea of proof comes from Pisier's method on the boundedness of Riesz transform and Lust-Piquard's work on spin systems. Then we deduce a transportation type inequality from the $L_p$ Poincaré inequalities in the general noncommutative setting. This inequality is sharp up to a constant (in the Gaussian setting). Several applications are given, including Wiener/Rademacher chaos estimation and new examples of Rieffel's compact quantum metric spaces.

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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