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Let $S \subset \Bbb R^n$ be a smooth compact hypersurface with a strictly positive second fundamental form, $E$ be the Fourier extension operator on $S$, and $X$ be a Lebesgue measurable subset of $\Bbb R^n$. If $X$ contains a ball of each…

Classical Analysis and ODEs · Mathematics 2023-06-22 Bassam Shayya

This is the first of two articles in which we prove a sharp $L^p-L^2$ Fourier restriction theorem for a large class of smooth, finite type hypersurfaces in $\Bbb R^3$, which includes in particular all real-analytic hypersurfaces. The…

Classical Analysis and ODEs · Mathematics 2014-10-14 Isroil A. Ikomov , Detlef Müller

We give an abstract argument that an a priori Fourier restriction estimate for a certain choice of exponents automatically implies maximal and variational Fourier restriction estimates. These, in turn, provide pointwise and quantitative…

Classical Analysis and ODEs · Mathematics 2019-09-13 Vjekoslav Kovač

Conditional on Fourier restriction estimates for elliptic hypersurfaces, we prove optimal restriction estimates for polynomial hypersurfaces of revolution for which the defining polynomial has non-negative coefficients. In particular, we…

Classical Analysis and ODEs · Mathematics 2017-10-24 Betsy Stovall

We consider Guth's approach to the Fourier restriction problem via polynomial partitioning. By writing out his induction argument as a recursive algorithm and introducing new geometric information, known as the polynomial Wolff axioms, we…

Classical Analysis and ODEs · Mathematics 2019-09-26 Jonathan Hickman , Keith M. Rogers

The classical Stein--Tomas theorem extends the theory of linear Fourier restriction estimates from smooth manifolds to fractal measures exhibiting Fourier decay. In the multilinear setting, transversality allows for Fourier extension…

Classical Analysis and ODEs · Mathematics 2026-02-11 Itamar Oliveira , Ana E. de Orellana

We establish a sharp adjoint Fourier restriction inequality for the end-point Tomas-Stein restriction theorem on the circle under a certain arithmetic constraint on the support set of the Fourier coefficients of the given function. Such…

Classical Analysis and ODEs · Mathematics 2024-02-15 Valentina Ciccone , Felipe Gonçalves

We deal with the restriction phenomenon for the Fourier transform. We prove that each of the restriction conjectures for the sphere, the paraboloid, the elliptic hyperboloid in $\mathbb{R}^n$ implies that for the cone in $\mathbb{R}^{n+1}$.…

Classical Analysis and ODEs · Mathematics 2008-04-24 Fabio Nicola

We introduce a continuous analog of the Fourier ratio for compactly supported Borel measures. For a measure \(\mu\) on \(\mathbb{R}^d\) and \(f\in L^2(\mu)\), the Fourier ratio compares \(L^1\) and \(L^2\) norms of a regularized Fourier…

Classical Analysis and ODEs · Mathematics 2025-12-19 A. Iosevich , Z. Li , E. Palsson , A. Yavicoli

In this paper, we establish a general discrete Fourier restriction theorem. As an application, we make some progress on the discrete Fourier restriction associated with KdV equation.

Analysis of PDEs · Mathematics 2017-10-05 Xudong Lai , Yong Ding

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

We systematically study weighted $L^2$ restriction for quadratic manifolds of arbitrary codimensions by sharp uniform Fourier decay estimates and a refinement of the Du-Zhang method. Comparison with prior results is also discussed. In…

Classical Analysis and ODEs · Mathematics 2025-06-24 Zhenbin Cao , Jingyue Li , Changxing Miao , Yixuan Pang

We establish estimates for restrictions to certain curves in R^2 of the Fourier transforms of some fractal measures.

Classical Analysis and ODEs · Mathematics 2010-09-28 M. Burak Erdogan , Daniel M. Oberlin

The purpose of this note is to discuss several results that have been obtained in the last decade in the context of sharp adjoint Fourier restriction/Strichartz inequalities. Rather than aiming at full generality, we focus on several…

Classical Analysis and ODEs · Mathematics 2017-01-25 Damiano Foschi , Diogo Oliveira e Silva

We show, using a Knapp-type homogeneity argument, that the $(L^p, L^2)$ restriction theorem implies a growth condition on the hypersurface in question. We further use this result to show that the optimal $(L^p, L^2)$ restriction theorem…

Classical Analysis and ODEs · Mathematics 2007-05-23 Alex Iosevich

We give the p-adic and F_q((t)) analogue of the real van der Corput Lemma, where the real condition of sufficient smoothness for the phase is replaced by the condition that the phase is a convergent power series. This van der Corput style…

Functional Analysis · Mathematics 2010-01-14 Raf Cluckers

In this paper we prove a uniform Fourier restriction estimate over the class of simple curves where the last coordinate function can be extended to a holomorphic function of bounded frequency in a sufficiently large disc. The proof is based…

Classical Analysis and ODEs · Mathematics 2023-03-31 Jaume de Dios Pont , Helge Jørgen Samuelsen

In this paper we show that the limiting distribution of the real and the imaginary part of the double Fourier transform of a stationary random field is almost surely an independent vector with Gaussian marginal distributions, whose variance…

Probability · Mathematics 2017-08-29 Magda Peligrad , Na Zhang

We improve the $L^p(\mathbb{R}^n)$ bounds on Stein's square function to the best-known range of the Fourier restriction problem when $n\geq4$. Applications including certain local smoothing estimates are also discussed.

Classical Analysis and ODEs · Mathematics 2021-09-15 Shengwen Gan , Changkeun Oh , Shukun Wu

The Fourier spectrum is a family of dimensions that interpolates between the Fourier and Hausdorff dimensions and are defined in terms of certain energies which capture Fourier decay. In this paper we obtain a convenient discrete…

Classical Analysis and ODEs · Mathematics 2024-03-20 Marc Carnovale , Jonathan M. Fraser , Ana E. de Orellana