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Sharp weighted estimates involving one supremum
(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 ...
Weak and strong $A_p$-$A_\infty$ estimates for square functions and related operators
(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} ...
A quantitative approach to weighted Carleson condition
(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 ...
Sparse domination theorem for multilinear singular integral operators with $L^{r}$-Hörmander condition
(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.
Quantitative weighted estimates for rough homogeneous singular integrals
(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 ...
Improved A1 − A∞ and related estimates for commutators of rough singular integrals
(2017)
An $A_1-A_\infty$ estimate improving a previous result in
[22] for $[b, T_\Omega]$ with $\Omega\in L^\infty(S^{n-1})$ and $b\in BMO$ is obtained. Also
a new result in terms of the $A_\infty$ constant and the one ...
On pointwise and weighted estimates for commutators of Calderón-Zygmund operators
(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 ...
A characterization of two weight norm inequality for Littlewood-Paley $g_{\lambda}^{*}$-function
(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 ...
The Calderón problem with corrupted data
(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, ...
Mixed norm estimates for the Cesàro means associated with Dunkl-Hermite expansions
(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 ...