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We prove an extension of the Walsh-analog of the Carleson-Hunt theorem, where the $L^\infty$ norm defining the Carleson maximal operator has been replaced by an $L^q$ maximal-multiplier-norm. Additionally, we consider certain associated…

Classical Analysis and ODEs · Mathematics 2011-10-06 Richard Oberlin

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

We prove the $L^p$-boundedness, $1<p<\infty$, of the Polynomial Carleson operator in general dimension. This follows the author's resolution of the one dimensional case as well as the work of Zorin-Kranich on the higher dimensional case in…

Classical Analysis and ODEs · Mathematics 2017-12-11 Victor Lie

We make progress on an interesting problem on the boundedness of maximal modulations of the Hilbert transform along the parabola. Namely, if we consider the multiplier arising from it and restrict it to lines, we prove uniform $L^p$ bounds…

Classical Analysis and ODEs · Mathematics 2019-08-07 João P. G. Ramos

A formulation of the Carleson embedding theorem in the multilinear setting is proved which allows to obtain a multilinear analogue of Sawyer's two weight theorem for the multisublinear maximal function \mathcal{M} introduced in Lerner et…

Classical Analysis and ODEs · Mathematics 2013-07-10 Wei Chen , Wendolín Damián

Quantitative formulations of Fefferman's counterexample for the ball multiplier are naturally linked to square function estimates for conical and directional multipliers. In this article we develop a novel framework for these square…

Classical Analysis and ODEs · Mathematics 2023-09-27 Natalia Accomazzo , Francesco Di Plinio , Paul Hagelstein , Ioannis Parissis , Luz Roncal

We extend a classical theorem of Carlson on moments of Dirichlet series from $p=2$ to $1 \leq p < \infty$. When combined with the ergodic theorem for the Kronecker flow, a coherent approach to almost sure properties of vertical limit…

Classical Analysis and ODEs · Mathematics 2025-10-08 Ole Fredrik Brevig , Athanasios Kouroupis

For weighted $L^1$ space on the unit sphere of $\RR^{d+1}$, in which the weight functions are invariant under finite reflection groups, a maximal function is introduced and used to prove the almost everywhere convergence of orthogonal…

Classical Analysis and ODEs · Mathematics 2007-05-23 Yuan Xu

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

This note compares two quantitative versions of the Nonlinear Carleson Conjecture (NCC). We provide motivations for our conjectures and show that they both imply the NCC. We discuss the connection to Carleson-Hunt maximal functions and give…

Analysis of PDEs · Mathematics 2025-11-11 Sergey A. Denisov

We prove variation-norm estimates for certain oscillatory integrals related to Carleson's theorem. Bounds for the corresponding maximal operators were first proven by Stein and Wainger. Our estimates are sharp in the range of exponents, up…

Classical Analysis and ODEs · Mathematics 2020-09-03 Shaoming Guo , Joris Roos , Po-Lam Yung

In this paper we formulate embedding maps into time-frequency space related to the Carleson operator and its variational counterpart. We prove bounds for these embedding maps by iterating the outer measure theory of [DT15]. Introducing…

Classical Analysis and ODEs · Mathematics 2016-10-26 Gennady Uraltsev

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

We prove pointwise variational Lp bounds for a bilinear Fourier integral operator in a large but not necessarily sharp range of exponents. This result is a joint strengthening of the corresponding bounds for the classical Carleson operator,…

Classical Analysis and ODEs · Mathematics 2016-05-03 Yen Do , Camil Muscalu , Christoph Thiele

We give a simple proof of a well-known theorem of G\'al and of the recent related results of Aistleitner, Berkes and Seip [1] regarding the size of GCD sums. In fact, our method obtains the asymptotically sharp constant in G\'al's theorem,…

Number Theory · Mathematics 2014-08-12 Mark Lewko , Maksym Radziwill

We prove some Sawyer-type characterizations for multilinear fractional maximal function for the upper triangle case. We also provide some two-weight norm estimates for this operator. As one of the main tools, we use an extension of the…

Classical Analysis and ODEs · Mathematics 2015-02-10 Benoit F. Sehba

This article establishes a real-variable argument for Zygmund's theorem on almost everywhere convergence of strong arithmetic means of partial sums of Fourier series on $\mathbb{T}$, up to passing to a subsequence. Our approach extends to,…

Classical Analysis and ODEs · Mathematics 2013-04-15 Bobby Wilson

A particular consequence of the famous Carleson-Hunt theorem is that the Taylor series expansions of bounded holomorphic functions on the open unit disk converge almost everywhere on the boundary, whereas on single points the convergence…

Functional Analysis · Mathematics 2022-03-23 Andreas Defant , Ingo Schoolmann

For $c\in(1,2)$ we consider the following operators \[ \mathcal{C}_{c}f(x) = \sup_{\lambda \in [-1/2,1/2)}\bigg| \sum_{n \neq 0}f(x-n) \frac{e^{2\pi i\lambda \lfloor |n|^{c} \rfloor}}{n}\bigg|\text{,}\quad \mathcal{C}^{\mathsf{sgn}}_{c}f(x)…

Dynamical Systems · Mathematics 2026-03-17 Leonidas Daskalakis , Anastasios Fragkos

Fourier restriction theorems, whose study had been initiated by E.M. Stein, usually describe a family of a priori estimates of the L^q-norm of the restriction of the Fourier transform of a function f in L^p (say, on Euclidean space) to a…

Classical Analysis and ODEs · Mathematics 2016-12-16 Detlef Müller , Fulvio Ricci , James Wright