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Related papers: Carleson's Theorem: Proof, Complements, Variations

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This paper is meant to be a gentle introduction to Carleson's Theorem on pointwise convergence of Fourier series.

Classical Analysis and ODEs · Mathematics 2016-12-09 Ciprian Demeter

Carleson's theorem on the pointwise convergence of Fourier series provides bounds for a maximal operator, with the maximum taken over all choices of linear functions of a phase argument. We extend this to all quadratic choices of phase…

Classical Analysis and ODEs · Mathematics 2007-05-23 Michael Lacey

A. Poltotaski proved an analog of Carleson's Theorem on almost everywhere convergence of Fourier series for a version of the non-linear Fourier transform. We aim to present his proof in full detail and elaborate on the ideas behind each…

Complex Variables · Mathematics 2022-10-25 Lukas Mauth

The celebrated Carleson-Hunt theorem gives pointwise almost everywhere convergence for the Fourier series of a function in $L^p(\mathbb T)$. R. Oberlin, A. Seeger, T. Tao, C. Thiele and J. Wright (OSTTW) strengthened this theorem by proving…

Classical Analysis and ODEs · Mathematics 2025-08-26 Himali Dabhi

This paper is the blueprint underlying the Lean formalization of the proof of Carleson's classical result asserting almost everywhere convergence of Fourier series of continuous functions. We break up the proof into two steps, a reduction…

We prove a vector-valued version of Carleson's theorem: Let Y=[X,H]_t be a complex interpolation space between a UMD space X and a Hilbert space H. For p\in(1,\infty) and f\in L^p(T;Y), the partial sums of the Fourier series of f converge…

Functional Analysis · Mathematics 2015-09-02 Tuomas P. Hytönen , Michael T. Lacey

We prove a version of Carleson's Theorem in the Walsh model for vector-valued functions: For $1<p< \infty$, and a UMD space $Y$, the Walsh-Fourier series of $f \in L ^{p}(0,1;Y)$ converges pointwise, provided that $Y$ is a complex…

Classical Analysis and ODEs · Mathematics 2019-11-20 Tuomas P. Hytönen , Michael T. Lacey

Suppose $1 < p < \infty$. Carleson's Theorem states that the Fourier series of any function in $L^p[-\pi, \pi]$ converges almost everywhere. We show that the Schnorr random points are precisely those that satisfy this theorem for every $f…

Logic · Mathematics 2016-03-16 Johanna Franklin , Timothy McNicholl , Jason Rute

We prove pointwise convergence for the scattering data of a Dirac system of differential equations. Equivalently, we prove an analog of Carleson's theorem on almost everywhere convergence of Fourier series for a version of the non-linear…

Complex Variables · Mathematics 2025-12-22 Alexei Poltoratski

We prove an inversion theorem for the Fourier transform defined for normal functions, in the case when such functions are of moderate decrease, and in dimensions 2 and 3. This improves on Carleson's general almost everywhere convergence…

Mathematical Physics · Physics 2024-04-01 Tristram de Piro

We strengthen the Carleson-Hunt theorem by proving $L^p$ estimates for the $r$-variation of the partial sum operators for Fourier series and integrals, for $p>\max\{r',2\}$. Four appendices are concerned with transference, a variation norm…

Classical Analysis and ODEs · Mathematics 2010-08-26 Richard Oberlin , Andreas Seeger , Terence Tao , Christoph Thiele , James Wright

We prove $L^p$ bounds, $\frac{d^2 + 4d + 2}{(d+1)^2} < p < 2(d+1)$, for maximal linear modulations of singular integrals along paraboloids with frequencies in certain subspaces of $\mathbb{R}^{d+1}$, for $d \geq 2$. This generalizes…

Classical Analysis and ODEs · Mathematics 2025-10-02 Lars Becker

We prove that the lacunary Carleson operator is bounded from $L \log L$ to $L^{1}$. This result is sharp. The proof is based on two newly introduced concepts: 1) the \emph{time-frequency regularization of a measurable set} and 2) the…

Classical Analysis and ODEs · Mathematics 2019-02-12 Victor Lie

We prove a variation norm Carleson theorem for Walsh-Fourier series of functions with values in a UMD Banach space. Our only hypothesis on the Banach space is that it has finite tile-type, a notion introduced by Hyt\"onen and Lacey. Given q…

Classical Analysis and ODEs · Mathematics 2019-05-28 Tuomas P. Hytönen , Michael T. Lacey , Ioannis Parissis

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

In this note we present a new proof of the Carleson Embedding Theorem on the unit disc and unit ball. The only technical tool used in the proof of this fact is Green's formula. The starting point is that every Carleson measure gives rise to…

Classical Analysis and ODEs · Mathematics 2010-05-05 Stefanie Petermichl , Sergei Treil , Brett D. Wick

We provide a near-complete classification of the Lorentz spaces $\Lambda_{\varphi}$ for which the sequence $\{S_{n}\}_{n\in \mathbb{N}}$ of partial Fourier sums is almost everywhere convergent along lacunary subsequences. Moreover, under…

Classical Analysis and ODEs · Mathematics 2016-01-20 Victor Lie

In this paper we prove the weighted martingale Carleson Embedding Theorem with matrix weights both in the domain and in the target space.

Classical Analysis and ODEs · Mathematics 2017-08-25 Amalia Culiuc , Sergei Treil

Stein and Wainger proved the $L^p$ bounds of the polynomial Carleson operator for all integer-power polynomials without linear term. In the present paper, we partially generalise this result to all fractional monomials in dimension one.…

Classical Analysis and ODEs · Mathematics 2015-03-17 Shaoming Guo

The famous Carleson-Hunt theorem has been in focus of interest for a long time. This theorem concerns convergence almost everywhere of Fourier series of $f\in L_p$ functions for $1<p\leq \infty.$ Kolmogorov constructed a function $f\in L_1$…

Classical Analysis and ODEs · Mathematics 2023-12-13 N. Areshidze , L. -E. Persson , G. Tephnadze
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