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arXiv 2201.06530math.CA
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副产物、Bloom BMO和稀疏BMO函数

Paraproducts, Bloom BMO and Sparse BMO Functions

Valentia Fragkiadaki, Irina Holmes Fay

摘要:

我们解决了$L^p(μ)\rightarrow L^p(λ)$边界的paraproducts在布隆设置。我们引入某些“稀疏BMO”功能与稀疏集合没有无限增加的链,并使用这些来表达稀疏运营商的paraproducts和鞅变换的总和-基本上,作为Haar乘数-以及获得一个等价的规范之间的稀疏运营商$\mathcal{A}_\mathcal{S}$和paraproducts的组合物$Π^*_aΠ_b$。

英文摘要:

We address $L^p(μ)\rightarrow L^p(λ)$ bounds for paraproducts in the Bloom setting. We introduce certain "sparse BMO" functions associated with sparse collections with no infinitely increasing chains, and use these to express sparse operators as sums of paraproducts and martingale transforms -- essentially, as Haar multipliers -- as well as to obtain an equivalence of norms between sparse operators $\mathcal{A}_\mathcal{S}$ and compositions of paraproducts $Π^*_aΠ_b$.

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