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In this article, we study the problem of obtaining Lebesgue space inequalities for the Fourier restriction operator associated to rectangular pieces of the paraboloid and perturbations thereof. We state a conjecture for the dependence of…

Classical Analysis and ODEs · Mathematics 2019-11-27 Jeremy Schwend , Betsy Stovall

Using a bilinear restriction theorem of Lee and a bilinear-to-linear argument of Stovall, we obtain the conjectured range of Fourier restriction estimates for a conical hypersurface in $\mathbb{R}^4$ with hyperbolic cross sections.

Classical Analysis and ODEs · Mathematics 2020-05-28 Benjamin Bruce

Following the ideas from a paper by the same author, we prove abstract maximal restriction results for the Fourier transform. Our results deal mainly with maximal operators of convolution-type and $r-$average maximal functions. As a…

Classical Analysis and ODEs · Mathematics 2019-04-25 João Pedro Ramos

We establish variational estimates related to the problem of restricting the Fourier transform of a three-dimensional function to the two-dimensional Euclidean sphere. At the same time, we give a short survey of the recent field of maximal…

Classical Analysis and ODEs · Mathematics 2021-09-16 Vjekoslav Kovač , Diogo Oliveira e Silva

The problem of $L^p(R^3)\to L^2(S)$ Fourier restriction estimates for smooth hypersurfaces S of finite type in R^3 is by now very well understood for a large class of hypersurfaces, including all analytic ones. In this article, we take up…

Classical Analysis and ODEs · Mathematics 2017-06-14 Stefan Buschenhenke , Detlef Müller , Ana Vargas

We introduce some generalized topological concepts to deal with union-closed families, and show that one can reduce the proof of Frankl's conjecture to some families of so-called supratopological spaces. We prove some results on the…

Combinatorics · Mathematics 2025-09-18 André Carvalho , António Machiavelo

In this article we revisit some classical conjectures in harmonic analysis in the setting of mixed norm spaces $L^p_{rad} L^2_{ang} (\mathbb{R}^n)$. We produce sharp bounds for the restriction of the Fourier transform to compact…

Classical Analysis and ODEs · Mathematics 2016-01-20 Antonio Córdoba , Eric Latorre

We prove an extension of the Furstenberg set theorem to families of graphs satisfying a transversality condition. We apply the result to derive bounds on $L^{p}$-norms of Fourier transforms of fractal measures supported on plane curves.

Classical Analysis and ODEs · Mathematics 2025-08-27 Tuomas Orponen , Aleksi Pyörälä , Guangzeng Yi

We prove a Fourier restriction result, uniform over a certain collection of reference measures, for some indices in the Stein-Tomas range.

Classical Analysis and ODEs · Mathematics 2010-10-05 Daniel M. Oberlin

The purpose of this paper is to prove a Fourier restriction estimate for certain 2-dimensional surfaces in $\bbR^{2d}$, $d\ge 3$. These surfaces are defined by a complex curve $\gamma(z)$ of simple type, which is given by a mapping of the…

Classical Analysis and ODEs · Mathematics 2013-04-01 Jong-Guk Bak , Seheon Ham

This dissertation studies the Fourier restriction, which is to find the range of the constants p, q such that the L^q norm on a chosen subset of the Fourier domain is bounded above by the L^p norm in a spacial domain, up to some constant…

History and Overview · Mathematics 2025-12-16 Sicheng Zhang

In this paper, a family of radial deformations of the realization of the Lie superalgebra osp(1|2) in the theory of Dunkl operators is obtained. This leads to a Dirac operator depending on 3 parameters. Several function theoretical aspects…

Classical Analysis and ODEs · Mathematics 2011-04-26 H. De Bie , B. Orsted , P. Somberg , V. Soucek

We establish fractional Leibniz rules for the Dunkl Laplacian $\Delta_k$ of the form $$\|(-\Delta_k)^s(fg)\|_{L^p(d\mu_k)} \lesssim \|(-\Delta_k)^s f\|_{L^{p_1}(d\mu_k)} \|g\|_{L^{p_2}(d\mu_k)} + \|f\|_{L^{p_1}(d\mu_k)} \|(-\Delta_k)^s…

Functional Analysis · Mathematics 2026-05-13 The Anh Bui , Suman Mukherjee

In the previous author's paper the Macdonald norm conjecture (including the famous constant term conjecture) was proved. This paper contains the proof of the remaining two (the duality and evaluation conjectures). The evaluation theorem is…

q-alg · Mathematics 2009-10-28 Ivan Cherednik

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

In this paper we prove the Fourier restriction theorem for $p=2$ on Riemannian symmetric spaces of noncompact type with real rank one which extends the earlier result proved in \cite[Theorem 1.1]{KRS}. This result depends on the weak $L^2$…

Functional Analysis · Mathematics 2015-07-14 Pratyoosh Kumar

A new generalized function space in which all Gelfand-Shilov classes $S^{\prime 0}_\alpha$ ($\alpha>1$) of analytic functionals are embedded is introduced. This space of {\it ultrafunctionals} does not possess a natural nontrivial topology…

Functional Analysis · Mathematics 2007-05-23 A. G. Smirnov

It is considered Fourier transform of convex analytic hypersufaces on $R^{4} $. We prove that the Fourier restriction operator associated to convex analytic hypersufaces is \textit{$(L_{p}, L_{2})$} bounded whenever $1\le p\le…

Classical Analysis and ODEs · Mathematics 2010-04-16 D. D. Turakulov

In this note, we present two arguments showing that the classical \textit{linear adjoint cone restriction conjecture} holds for the class of functions supported on the cone and invariant under the spatial rotation in all dimensions. The…

Classical Analysis and ODEs · Mathematics 2008-06-20 Shuanglin Shao

In this paper, we present a different proof on the discrete Fourier restriction. The proof recovers Bourgain's level set result on Strichartz estimates associated with Schr\"odinger equations on torus. Some sharp estimates on…

Classical Analysis and ODEs · Mathematics 2011-08-26 Yi Hu , Xiaochun Li