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We dominate non-integral singular operators by adapted sparse operators and derive optimal norm estimates in weighted spaces. Our assumptions on the operators are minimal and our result applies to an array of situations, whose prototype are…

Classical Analysis and ODEs · Mathematics 2016-08-03 Frédéric Bernicot , Dorothee Frey , Stefanie Petermichl

We obtain an alternative approach to recent results by M. Lacey \cite{La} and T. Hyt\"onen {\it et al.} \cite{HRT} about a pointwise domination of $\omega$-Calder\'on-Zygmund operators by sparse operators. This approach is rather elementary…

Classical Analysis and ODEs · Mathematics 2016-06-03 Andrei K. Lerner

The goal of this expository paper is to give a self-contained introduction to sparse domination. This is a method relying on techniques from dyadic Harmonic Analysis which has received a lot of attention in recent years. Essentially, it…

Classical Analysis and ODEs · Mathematics 2024-07-09 Rodrigo Duarte

In this paper we obtain quantitative weighted $L^p$-inequalities for some operators involving Bessel convolutions. We consider maximal operators, Littlewood-Paley functions and variational operators. We obtain $L^p(w)$-operator norms in…

Classical Analysis and ODEs · Mathematics 2021-10-06 Víctor Almeida , Jorge J. Betancor , Juan C. Fariña , Lourdes Rodríguez-Mesa

In this note we give simple proofs of several results involving maximal truncated Calde\'on-Zygmund operators in the general setting of rearrangement invariant quasi-Banach function spaces by sparse domination. Our techniques allow us to…

Classical Analysis and ODEs · Mathematics 2019-10-29 Theresa C. Anderson , Bingyang Hu

We prove sharp weighted estimates for the non-tangential maximal function of singular integrals mapping functions from $\mathbf{R}^n$ to the half-space in $\mathbf{R}^{1+n}$ above $\mathbf{R}^n$. The proof is based on pointwise sparse…

Classical Analysis and ODEs · Mathematics 2024-09-04 Andreas Rosén

In this paper, we give a sharp sparse domination of pseudodifferential operators associated with symbols belonging to the H\"{o}rmander class, and fundamental solutions of dispersive equations. Furthermore, we give boundedness results of…

Functional Analysis · Mathematics 2022-11-28 Ryosuke Yamamoto

We study the problem of dominating the dyadic strong maximal function by $(1, 1)$-type sparse forms based on rectangles with sides parallel to the axes, and show that such domination is impossible. Our proof relies on an explicit…

Classical Analysis and ODEs · Mathematics 2018-11-06 Alex Barron , Jose M. Conde-Alonso , Yumeng Ou , Guillermo Rey

We introduce a class of operators on abstract measure spaces, which unifies the Calder\'on-Zygmund operators on spaces of homogeneous type, the maximal functions and the martingale transforms. We prove that such operators can be dominated…

Classical Analysis and ODEs · Mathematics 2022-11-07 Grigori A. Karagulyan

We establish a uniform domination of the family of trilinear multiplier forms with singularity over a one-dimensional subspace by positive sparse forms involving $L^p$-averages. This class includes the adjoint forms to the bilinear Hilbert…

Classical Analysis and ODEs · Mathematics 2018-05-30 Amalia Culiuc , Francesco Di Plinio , Yumeng Ou

In this work we extend Lacey's domination theorem to prove the pointwise control of bilinear Calder\'on--Zygmund operators with Dini--continuous kernel by sparse operators. The precise bounds are carefully tracked following the spirit in a…

Classical Analysis and ODEs · Mathematics 2018-09-05 Wendolín Damián , Mahdi Hormozi , Kangwei Li

Due to its nonlocal nature, the $r$-variation norm Carleson operator $C_r$ does not yield to the sparse domination techniques of Lerner, Di Plinio and Lerner, Lacey. We overcome this difficulty and prove that the dual form to $C_r$ can be…

Classical Analysis and ODEs · Mathematics 2017-04-07 Francesco Di Plinio , Yen Q. Do , Gennady N. Uraltsev

The technique of sparse domination, i.e., dominating operators with sums of averages taken over sparsely distributed cubes, has seen rapid development recently within the realms of harmonic analysis. A useful extension of sparse domination…

Functional Analysis · Mathematics 2023-11-20 Aapo Laukkarinen

In this note, we show that if $T$ is a Calder\'on--Zygmund operator satisfying $T(1)=0$, then the usual sparse domination for $T$ can be sharpened by replacing local averages by local mean oscillations. As an application, we characterize…

Classical Analysis and ODEs · Mathematics 2026-05-27 Andrei K. Lerner

We develop the self similarity argument known as sparse domination in an abstract martingale setting, using a continuous time parameter. With this method, we prove a sharp weighted L^p estimate for the maximal operator Y^* of Y with respect…

Probability · Mathematics 2019-04-23 Komla Domelevo , Stefanie Petermichl

We improve on several weighted inequalities of recent interest by replacing a part of the A_p bounds by weaker A_\infty estimates involving Wilson's A_\infty constant \[ [w]_{A_\infty}':=\sup_Q\frac{1}{w(Q)}\int_Q M(w\chi_Q). \] In…

Classical Analysis and ODEs · Mathematics 2011-03-30 Tuomas Hytönen , Carlos Pérez

In this paper we develop a kind of A_p theory for Calderon-Zygmund operators in a non-homogeneous setting. Let \mu be a Borel measure on \R^d which may be non doubling. The only condition that \mu must satisfy is \mu(B(x,r))\leq Cr^n for…

Classical Analysis and ODEs · Mathematics 2011-10-18 Xavier Tolsa

We obtain mixed $A_p$--$A_\infty$ estimates for a large family of multilinear maximal and sparse operators. Operators from this family are known to control for instance multilinear Calder\'on--Zygmund operators, square functions, fractional…

Classical Analysis and ODEs · Mathematics 2019-08-27 Pavel Zorin-Kranich

We prove a quadratic sparse domination result for general non-integral square functions $S$. That is, we prove an estimate of the form \begin{equation*} \int_{M} (S f)^{2} g \, \mathrm{d}\mu \le c \sum_{P \in \mathcal{S}}…

Classical Analysis and ODEs · Mathematics 2023-11-07 Julian Bailey , Gianmarco Brocchi , Maria Carmen Reguera

We present a general sparse domination principle which respects the cancellative structure of the functions under study. We obtain sparse domination results in general measure spaces, including general martingale settings in one and two…

Classical Analysis and ODEs · Mathematics 2026-05-12 José M. Conde Alonso , Emiel Lorist , Guillermo Rey