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Sharp weighted estimates involving one supremum 

Li K. (Comptes Rendus Mathematique, 2017-07)
In this note, we study the sharp weighted estimate involving one supremum. In particular, we give a positive answer to an open question raised by Lerner and Moen. We also extend the result to rough homogeneous singular ...
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Weak and strong $A_p$-$A_\infty$ estimates for square functions and related operators 

Hytönen T.; Li K. (Proceedings of the American Mathematical Society, 2017-07)
We prove sharp weak and strong type weighted estimates for a class of dyadic operators that includes majorants of both standard singular integrals and square functions. Our main new result is the optimal bound $[w]_{A_p} ...
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A quantitative approach to weighted Carleson condition 

Rivera-Ríos I.P. (Concrete Operators, 2017-05-05)
Quantitative versions of weighted estimates obtained by F. Ruiz and J.L. Torrea for the operator \[ \mathcal{M}f(x,t)=\sup_{x\in Q,\,l(Q)\geq t}\frac{1}{|Q|}\int_{Q}|f(x)|dx \qquad x\in\mathbb{R}^{n}, \, t \geq0 \] are ...
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Sparse domination theorem for multilinear singular integral operators with $L^{r}$-Hörmander condition 

Li K. (Michigan Mathematical Journal, 2017-04-01)
In this note, we show that if $T$ is a multilinear singular integral operator associated with a kernel satisfies the so-called multilinear $L^{r}$-Hörmander condition, then $T$ can be dominated by multilinear sparse operators.
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Quantitative weighted estimates for rough homogeneous singular integrals 

Hytönen T. P.; Roncal L.; Tapiola O. (Israel Journal of Mathematics, 2017-03-11)
We consider homogeneous singular kernels, whose angular part is bounded, but need not have any continuity. For the norm of the corresponding singular integral operators on the weighted space $L^2(w)$, we obtain a bound ...
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A characterization of two weight norm inequality for Littlewood-Paley $g_{\lambda}^{*}$-function 

Cao M.; Li K.; Xue Q. (Journal of Geometric Analysis, 2017)
Let $n\ge 2$ and $g_{\lambda}^{*}$ be the well-known high dimensional Littlewood-Paley function which was defined and studied by E. M. Stein, $$g_{\lambda}^{*}(f)(x)=\bigg(\iint_{\mathbb R^{n+1}_{+}} \Big(\frac{t}{t+|x-y ...
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The Calderón problem with corrupted data 

Caro P.; García A. (Inverse Problems, 2017-01)
We consider the inverse Calderón problem consisting of determining the conductivity inside a medium by electrical measurements on its surface. Ideally, these measurements determine the Dirichlet-to-Neumann map and, therefore, ...
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Mixed norm estimates for the Cesàro means associated with Dunkl-Hermite expansions 

Boggarapu P.; Roncal L.; Thangavelu S. (Transactions of the American Mathematical Society, 2017)
Our main goal in this article is to study mixed norm estimates for the Cesàro means associated with Dunkl--Hermite expansions on $\mathbb{R}^d$. These expansions arise when one considers the Dunkl--Hermite operator ...
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Weighted mixed weak-type inequalities for multilinear operators 

Li K.; Ombrosi S.; Picardi B. (Studia Mathematica, 2017)
In this paper we present a theorem that generalizes Sawyer's classic result about mixed weighted inequalities to the multilinear context. Let $\vec{w}=(w_1,...,w_m)$ and $\nu = w_1^\frac{1}{m}...w_m^\frac{1}{m}$, the main ...
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On pointwise and weighted estimates for commutators of Calderón-Zygmund operators 

Lerner A. K; Ombrosi S.; Rivera-Ríos I.P. (Advances in Mathematics, 2017)
In recent years, it has been well understood that a Calderón-Zygmund operator T is pointwise controlled by a finite number of dyadic operators of a very simple structure (called the sparse operators). We obtain a similar ...
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AuthorLi K. (5)Rivera-Ríos I.P. (3)Ombrosi S. (2)Roncal L. (2)Boggarapu P. (1)Cao M. (1)Caro P. (1)García A. (1)Hytönen T. (1)Hytönen T. P. (1)... View MoreSubject$A_p$-$A_\infty$ estimates (1)$L^{r}$-Hörmander condition (1)bumps (1)entropy (1)Littlewood-Paley $g_{\lambda}^*$-function (1)Maximal operator (1)mixed weighted inequalities (1)multilinear operators (1)one supremum estimate (1)Pivotal condition (1)... View MoreDate Issued
2017 (11)

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