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arXiv 1003.0580math.CAmath.FA
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$ax+b$ -群上的并元集、极大函数及其应用

Dyadic Sets, Maximal Functions and Applications on $ax+b$ --Groups

Liguang Liu, Maria Vallarino, Dachun Yang

摘要:

设$S$是具有左不变黎曼对称空间结构和右Haar测度$ρ$的李群$\mathrm{R}^n\ltimes \mathrm{R}^+$,它是指数增长性的李群. Hebisch和Steger在[Math. Z. 245(2003),37--61]证明了在$(S,ρ)$上的任何可积函数都允许Calderon-Zygmund分解,其中涉及一个特殊的集合族,称为Calderon-Zygmund集。本文首先证明了群$S$中并元网格的存在性,它具有类似于经典欧氏并元立方体的{nice}性质。利用并矢网格的性质,我们将证明一个涉及并矢极大Hardy-Littlewood函数和并矢sharp并矢函数的Fittman-Stein型不等式。因此,我们得到了涉及Hardy空间$H^1$和[Collect.Math.60(2009),277- 295]中引入的$BMO$空间的复内插定理。

英文摘要:

Let $S$ be the Lie group $\mathrm{R}^n\ltimes \mathrm{R}^+$ endowed with the left-invariant Riemannian symmetric space structure and the right Haar measure $ρ$, which is a Lie group of exponential growth. Hebisch and Steger in [Math. Z. 245(2003), 37--61] proved that any integrable function on $(S,ρ)$ admits a Calderón--Zygmund decomposition which involves a particular family of sets, called Calderón--Zygmund sets. In this paper, we first show the existence of a dyadic grid in the group $S$, which has {nice} properties similar to the classical Euclidean dyadic cubes. Using the properties of the dyadic grid we shall prove a Fefferman--Stein type inequality, involving the dyadic maximal Hardy--Littlewood function and the dyadic sharp dyadic function. As a consequence, we obtain a complex interpolation theorem involving the Hardy space $H^1$ and the $BMO$ space introduced in [Collect. Math. 60(2009), 277--295].

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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