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In this series of two papers, we will prove a natural matrix weighted $T1$ theorem for matrix kernelled CZOs. In the current paper, we will prove matrix weighted norm inequalities for matrix symbolled paraproducts via a general matrix…

Classical Analysis and ODEs · Mathematics 2017-03-20 Joshua Isralowitz , Hyun Kyoung Kwon , Sandra Pott

In this paper, we show that dyadic paraproducts $\pi_b$ with $b$ in dyadic BMO are bounded on matrix weighted $L^p(W)$ if $W$ is a matrix $\text{A}_p$ weight.

Classical Analysis and ODEs · Mathematics 2017-03-20 Joshua Isralowitz

In this paper, we study the dyadic Carleson Embedding Theorem in the matrix weighted setting. We provide two new proofs of this theorem, which highlight connections between the matrix Carleson Embedding Theorem and both maximal functions…

Classical Analysis and ODEs · Mathematics 2016-02-08 Kelly Bickel , Brett D. Wick

It is well-known that dyadic martingale transforms are a good model for Calder\'on-Zygmund singular integral operators. In this paper we extend some results on weighted norm inequalities to vector-valued functions. We prove that, if $W$ is…

Classical Analysis and ODEs · Mathematics 2017-08-02 Sandra Pott , Andrei Stoica

We obtain $L^p(w)$ bounds for the Carleson operator ${\mathcal C}$ in terms of the $A_q$ constants $[w]_{A_q}$ for $1\le q\le p$. In particular, we show that, exactly as for the Hilbert transform, $\|{\mathcal C}\|_{L^p(w)}$ is bounded…

Classical Analysis and ODEs · Mathematics 2013-10-15 Andrei K. Lerner

We prove $L^p(w)$ bounds for the Carleson operator ${\mathcal C}$, its lacunary version $\mathcal C_{lac}$, and its analogue for the Walsh series $\W$ in terms of the $A_q$ constants $[w]_{A_q}$ for $1\le q\le p$. In particular, we show…

Classical Analysis and ODEs · Mathematics 2017-05-17 Francesco Di Plinio , Andrei K. Lerner

In this paper we characterize the two matrix weighted boundedness of commutators with any of the Riesz transforms (when both are matrix A${}_p$ weights) in terms of a natural two matrix weighted BMO space. Furthermore, we identify this BMO…

Classical Analysis and ODEs · Mathematics 2017-07-13 Joshua Isralowitz

In this paper, we will prove a matrix weighted $T1$ theorem regarding the boundedness of certain matrix kernelled CZOs on matrix weighted $L^p(W)$ for matrix A${}_p$ weights $W$. Using some of the ideas from the proof, we will also…

Classical Analysis and ODEs · Mathematics 2017-07-13 Joshua Isralowitz

Let $L=-\Delta +V$ with non-negative potential $V$ satisfying some appropriate reverse H\"older inequality. In this paper, we study the boundedness of the commutators of some singular integrals associated to $L$ such as Riesz transforms and…

Classical Analysis and ODEs · Mathematics 2012-02-23 The Anh Bui

Let $T$ be a Calder\'on-Zygmund singular integral operator. In this paper, we will show some weighted boundedness properties of commutator $[b,T]$ on the weighted Morrey spaces $L^{p,\kappa}(w)$ under appropriate conditions on the weight…

Classical Analysis and ODEs · Mathematics 2012-03-19 Hua Wang

We establish weighted inequalities for $BMO$ commutators of sublinear operators for all $0<p<\infty$. For weights $w$ satisfying the doubling condition of order $q$ with $0<q<p$ and the reverse H\"{o}lder condition, we prove that $\bullet$…

Classical Analysis and ODEs · Mathematics 2021-08-12 Shunchao Long

Let $R$ be the vector of Riesz transforms on $\mathbb{R}^n$, and let $\mu,\lambda \in A_p$ be two weights on $\mathbb{R}^n$, $1 < p < \infty$. The two-weight norm inequality for the commutator $[b, R] : L^p(\mathbb{R}^n;\mu) \to…

Classical Analysis and ODEs · Mathematics 2017-05-30 Irina Holmes , Michael T. Lacey , Brett D. Wick

In this article, using variable matrix ${\mathscr{A}}_{p(\cdot),\infty}$ weights, we introduce the matrix-weighted variable Besov space $B^{s(\cdot)}_{p(\cdot),q(\cdot)}(W)$ and the corresponding averaging variable Besov space…

Functional Analysis · Mathematics 2026-02-13 Dachun Yang , Wen Yuan , Zongze Zeng

We define a scale of L^q Carleson norms, all of which characterize the membership of a function in BMO. The phenomenon is analogous to the John-Nirenberg inequality, but on the level of Carleson measures. The classical Carleson condition…

Functional Analysis · Mathematics 2008-11-21 Tuomas Hytönen , Lutz Weis

The dyadic paraproduct is bounded in weighted Lebesgue spaces $L_p(w)$ if and only if the weight $w$ belongs to the Muckenhoupt class $A_p^d$. However, the sharp bounds on the norm of the dyadic paraproduct are not known even in the…

Functional Analysis · Mathematics 2012-12-19 Oleksandra V. Beznosova

As our main result, we supply the missing characterization of the $L^p(\mu)\to L^q(\lambda)$ boundedness of the commutator of a non-degenerate Calder\'on--Zygmund operator $T$ and pointwise multiplication by $b$ for exponents $1<q<p<\infty$…

Classical Analysis and ODEs · Mathematics 2025-08-12 Timo S. Hänninen , Emiel Lorist , Jaakko Sinko

We prove a bilinear Carleson embedding theorem with matrix weight and scalar measure. In the scalar case, this becomes exactly the well known weighted bilinear Carleson embedding theorem. Although only allowing scalar Carleson measures, it…

Classical Analysis and ODEs · Mathematics 2023-03-30 Stefanie Petermichl , Sandra Pott , Maria Carmen Reguera

For a matrix A_2 weight W on R^p, we introduce a new notion of W-Calder\'on-Zygmund matrix kernels, following earlier work in by Isralowitz. We state and prove a T1 theorem for such operators and give a representation theorem in terms of…

Classical Analysis and ODEs · Mathematics 2017-05-18 Sandra Pott , Andrei Stoica

In this paper we approach the two weighted boundedness of commutators via matrix weights. This approach provides both a sufficient and a necessary condition for the two weighted boundedness of commutators with an arbitrary linear operator…

Classical Analysis and ODEs · Mathematics 2020-01-31 Joshua Isralowitz , Sandra Pott , Sergei Treil

We examine dyadic paraproducts and commutators in the non-homogeneous setting, where the underlying Borel measure $\mu$ is not assumed to be doubling. We first establish a pointwise sparse domination for dyadic paraproducts and related…

Classical Analysis and ODEs · Mathematics 2025-10-31 Francesco D'Emilio , Yongxi Lin , Nathan A. Wagner , Brett D. Wick
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