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In this paper we provide a proof of the Carleson $\varepsilon^2$-conjecture. This result yields a characterization (up to exceptional sets of zero length) of the tangent points of a Jordan curve in terms of the finiteness of the associated…

Classical Analysis and ODEs · Mathematics 2019-10-22 Benjamin Jaye , Xavier Tolsa , Michele Villa

In this article, we prove a quantitative version of Carleson's $\varepsilon^2$ conjecture in higher dimension: we characterise those Ahlfors-David regular domains in $\mathbb{R}^{n+1}$ for which the Carleson's coefficients satisfy the…

Classical Analysis and ODEs · Mathematics 2025-05-19 Emily Casey , Xavier Tolsa , Michele Villa

We prove that the solvability of the regularity problem in $L^q(\partial \Omega)$ is stable under Carleson perturbations. If the perturbation is small, then the solvability is preserved in the same $L^q$, and if the perturbation is large,…

Analysis of PDEs · Mathematics 2022-08-02 Zanbing Dai , Joseph Feneuil , Svitlana Mayboroda

Following M.Abate and A.Saracco's work on strongly pseudoconvex domains in $\mathbb{C}^n$, we characterize Carleson measures of $A^2(D)$ in bounded convex domains with smooth boundary of finite type. We also give examples of Carleson…

Complex Variables · Mathematics 2020-12-16 Haichou Li , Jinsong Liu , Hongyu Wang

We provide a characterization of Carleson measures on locally finite trees. This characterization establishes the connection between Carleson measures and the boundedness of a suitable Poisson integral between $L^p$-spaces. Additionally,…

Functional Analysis · Mathematics 2024-05-15 Alessandro Ottazzi , Federico Santagati

We study the Carleson measures on NTA and ADP domains in the Heisenberg groups $\mathbb{H}^n$ and provide two characterizations of such measures: (1) in terms of the level sets of subelliptic harmonic functions and (2) via the…

Analysis of PDEs · Mathematics 2024-09-19 Tomasz Adamowicz , Marcin Gryszówka

We provide characterizations of Carleson measures on a certain class of bounded pseudoconvex domains. An example of a vanishing Carleson measure whose Berezin transform does not vanish on the boundary is given in the class of the Hartogs…

Complex Variables · Mathematics 2020-09-22 Phung Trong Thuc

The notion of a Carleson measure was introduced by Lennart Carleson in his proof of the Corona Theorem for $H^\infty(\mathbb{D})$. In this paper we will define it for certain type of reproducing kernel Hilbert spaces of analytic functions…

Functional Analysis · Mathematics 2016-08-09 Andrzej S. Kucik

In this paper we present in concise form recent results, with illustrative proofs, on solvability of the $L^p$ Dirichlet, Regularity and Neumann problems for scalar elliptic equations on Lipschitz domains with coefficients satisfying a…

Analysis of PDEs · Mathematics 2022-12-02 Martin Dindoš , Jill Pipher

In this paper we prove a higher dimensional analogue of Carleson's $\varepsilon^2$ conjecture. Given two arbitrary disjoint open sets $\Omega^+,\Omega^-\subset \mathbb{R}^{n+1}$, and $x\in\mathbb{R}^{n+1}$, $r>0$, we denote…

Classical Analysis and ODEs · Mathematics 2023-12-21 Ian Fleschler , Xavier Tolsa , Michele Villa

A quantitative regularity theory is developed for weak solutions to the parabolic system $$ \partial_t u-\mathrm{div}\,{\boldsymbol{\mathsf A}}(x,t,Du)=0 \quad\text{in }E_T\subset \mathbb{R}^N\times\mathbb{R}, $$ which features the…

Analysis of PDEs · Mathematics 2026-01-14 Verena Bögelein , Frank Duzaar , Ugo Gianazza , Naian Liao

In one-sided Chord-Arc Domains $\Omega$, we demonstrate that the $A_\infty$-absolute continuity of the elliptic measure with respect to the surface measure remains stable under $L^2$ Carleson perturbations. This stability holds provided…

Analysis of PDEs · Mathematics 2025-08-05 Joseph Feneuil

The theory of Carleson measures, stopping time arguments, and atomic decompositions has been well-established in harmonic analysis. More recent is the theory of phase space analysis from the point of view of wave packets on tiles, tree…

Classical Analysis and ODEs · Mathematics 2007-05-23 Pascal Auscher , Steve Hofmann , Camil Muscalu , Terence Tao , Christoph Thiele

We establish two equivalent characterizations of $\mathrm{VMO}$ in terms of vanishing Carleson measures. First, we show that any $\mathrm{VMO}$ function admits a decomposition into a continuous boundary term and an integral operator…

Complex Variables · Mathematics 2026-03-18 Fei Tao , Yaosong Yang

We deal with a degenerate model describing the dynamics of a population depending on time, on age and on space. We assume that the degeneracy can occur at the boundary or in the interior of the space domain and we focus on null…

Analysis of PDEs · Mathematics 2019-01-24 Genni Fragnelli

Let $E \subset \mathbb R^{n+1}$ be a parabolic uniformly rectifiable set. We prove that every bounded solution $u$ to $$\partial_tu- \Delta u=0, \quad \text{in} \quad \mathbb R^{n+1}\setminus E$$ satisfies a Carleson measure estimate…

Analysis of PDEs · Mathematics 2023-06-28 Simon Bortz , John Hoffman , Steve Hofmann , José Luis Luna Garcia , Kaj Nyström

We continue the development, by reduction to a first order system for the conormal gradient, of $L^2$ \textit{a priori} estimates and solvability for boundary value problems of Dirichlet, regularity, Neumann type for divergence form second…

Classical Analysis and ODEs · Mathematics 2015-05-20 Pascal Auscher , Andreas Rosén

In this paper, we show that if the bounded solutions to the parabolic Dirichlet problem on a Lipshitz-$\left[1,\frac{1}{2}\right]$ domain obey a Carleson measure estimate, then the corresponding parabolic measure on the boundary will belong…

Analysis of PDEs · Mathematics 2025-09-08 James Warta , Steve Hofmann

Let \(0<q<p<\infty\), \(\Omega\) be a bounded \(\bbC\)-convex domains in \(\bbC^n\). We establish several equivalent characterizations for the boundedness of Carleson embedding \(J_\mu:A_\alpha^p\hookrightarrow L^q(\mu)\) on \(\Omega\) with…

Complex Variables · Mathematics 2025-12-19 Mingjin Li , Jianren Long , Lang Wang

Courant's theorem implies that the number of nodal domains of a Laplace eigenfunction is controlled by the corresponding eigenvalue. Over the years, there have been various attempts to find an appropriate generalization of this statement in…

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