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arXiv 2302.00542math.FAmath.APmath.CA
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局部化算子和交换子具有bmo和lmo的有界性

$h^1$ boundedness of Localized Operators and Commutators with bmo and lmo

Galia Dafni, Chun Ho Lau

摘要:

首先考虑卷积型奇异积分算子的两种局部化,并证明了在辅助函数的弱衰减和光滑条件下,它们在局部Hardy空间$h^1(\mathbb{R}^n)$上的有界性是等价的.在有界平均振荡函数的非齐次空间$bmo(\mathbb{R}^n)$中,我们研究了非齐次奇异积分算子与$b$的交换子$[b,T]$在$h^1(\mathbb{R}^n)$上的有界性.我们定义的原子空间$H^1_b(\mathbb{R}^n)$介绍了佩雷斯的情况下,均匀的哈代空间和$BMO$,包括一个变化涉及原子近似取消条件的本地类似物。对于这样的原子$a$,我们证明了相应的交换子极大函数和$[b,T](a)$的可积性。对于$lmo(\mathbb{R}^n)$中的$b$,这给出了$[b,T]$的$h^1$到$L^1$的有界性。最后,在$T$上附加的近似消去条件下,我们证明了$h^1$的有界性。

英文摘要:

We first consider two types of localizations of singular integral operators of convolution type, and show, under mild decay and smoothness conditions on the auxiliary functions, that their boundedness on the local Hardy space $h^1(\mathbb{R}^n)$ is equivalent. We then study the boundedness on $h^1(\mathbb{R}^n)$ of the commutator $[b,T]$ of an inhomogeneous singular integral operator with $b$ in $bmo(\mathbb{R}^n)$, the nonhomogeneous space of functions of bounded mean oscillation. We define local analogues of the atomic space $H^1_b(\mathbb{R}^n)$ introduced by Pérez in the case of the homogeneous Hardy space and $BMO$, including a variation involving atoms with approximate cancellation conditions. For such an atom $a$, we prove integrability of the associated commutator maximal function and of $[b,T](a)$. For $b$ in $lmo(\mathbb{R}^n)$, this gives $h^1$ to $L^1$ boundedness of $[b,T]$. Finally, under additional approximate cancellation conditions on $T$, we show boundedness to $h^1$.

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