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Sparse domination of singular Radon transform
Journal de Mathématiques Pures et Appliquées ( IF 2.1 ) Pub Date : 2020-03-23 , DOI: 10.1016/j.matpur.2020.03.012
Bingyang Hu

The purpose of this paper is to study the sparse bound of the operator of the form fψ(x)f(γt(x))K(t)dt, where γt(x) is a C function defined on a neighborhood of the origin in (x,t)Rn×Rk, satisfying γ0(x)x, ψ is a C cut-off function supported on a small neighborhood of 0Rn and K is a Calderón-Zygmund kernel supported on a small neighborhood of 0Rk. Christ, Nagel, Stein and Wainger gave conditions on γ under which T:LpLp(1<p<) is bounded. Under the these same conditions, we prove sparse bounds for T, which strengthens their result. As a corollary, we derive weighted norm estimates for such operators.



中文翻译:

Radon变换的稀疏控制

本文的目的是研究形式算子的稀疏界 FψXFγŤXķŤdŤ,在哪里 γŤX 是一个 C 在以下位置的原点附近定义的函数 XŤ[Rñ×[Rķ,令人满意 γ0XXψ是一个C 在以下地区的小社区上支持截止功能 0[Rñķ是支持的一小附近卡尔德龙,上Zygmund内核0[Rķ。Christ,Nagel,Stein和Wainger给出了关于γ的条件Ť大号p大号p1个<p<有界。在这些相同条件下,我们证明了T的稀疏边界,这加强了它们的结果。作为推论,我们得出了此类算子的加权范数估计。

更新日期:2020-03-23
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