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arXiv 1612.09201math.CA
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粗糙奇异积分的稀疏控制原理

A sparse domination principle for rough singular integrals

Jose M. Conde-Alonso, Amalia Culiuc, Francesco Di Plinio, Yumeng Ou

摘要:

证明了与$\mathbb R^d$上的粗糙齐次奇异积分$T_Ω$(其中角部$Ω\in L^q (S^{d-1})$的平均值为零,而角部$1<q\leq \infty$为零)以及与$\mathbb R^d$中临界指数处的Bochner-Riesz平均值相关的双线性型都由包含$(1,p)$平均值的稀疏形式所支配.这种支配是强于弱$L^1$估计$T_Ω$和Bochner-Riesz手段,分别由于西格和基督。此外,我们的控制定理作为一个推论,需要新的尖锐的定量$A_p$加权估计Bochner-Riesz平均和齐次奇异积分与无界角的一部分,扩展以前的结果Hytönen-Roncal-Tapiola $T_Ω$。我们的结果遵循一个新的抽象稀疏控制原理,它不依赖于弱端点估计的最大截断。

英文摘要:

We prove that bilinear forms associated to the rough homogeneous singular integrals $T_Ω$ on $\mathbb R^d$, where the angular part $Ω\in L^q (S^{d-1})$ has vanishing average and $1<q\leq \infty$, and to Bochner-Riesz means at the critical index in $\mathbb R^d$ are dominated by sparse forms involving $(1,p)$ averages. This domination is stronger than the weak-$L^1$ estimates for $T_Ω$ and for Bochner-Riesz means, respectively due to Seeger and Christ. Furthermore, our domination theorems entail as a corollary new sharp quantitative $A_p$-weighted estimates for Bochner-Riesz means and for homogeneous singular integrals with unbounded angular part, extending previous results of Hytönen-Roncal-Tapiola for $T_Ω$. Our results follow from a new abstract sparse domination principle which does not rely on weak endpoint estimates for maximal truncations.

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