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Consider the Fourier restriction operator associated to a curve in $R^d$, $d\ge 3$. We prove for various classes of curves the endpoint restricted strong type estimate with respect to affine arclength measure on the curve. An essential…

Classical Analysis and ODEs · Mathematics 2016-04-20 Jong-Guk Bak , Daniel M. Oberlin , Andreas Seeger

We prove sharp endpoint results for the Fourier restriction operator associated to nondegenerate curves in $\Bbb R^d$, $d\ge 3$, and related estimates for oscillatory integral operators. Moreover, for some larger classes of curves in $\Bbb…

Classical Analysis and ODEs · Mathematics 2010-03-15 Jong-Guk Bak , Daniel M. Oberlin , Andreas Seeger

We prove Fourier restriction estimates to arbitrary compact $C^{N}$ curves for any $N > d$ in the (sharp) Drury range, using a power of the affine arclength measure as a mitigating factor. In particular, we make no nondegeneracy assumption…

Classical Analysis and ODEs · Mathematics 2022-04-22 Michael Jesurum

We extend the estimates for maximal Fourier restriction operators proved by M\"{u}ller, Ricci, and Wright in \cite{MR3960255} and Ramos in \cite{MR4055940} to the case of arbitrary convex curves in the plane, with constants uniform in the…

Classical Analysis and ODEs · Mathematics 2024-08-15 Marco Fraccaroli

We prove a uniform Fourier extension-restriction estimate for a certain class of curves in d-dimensional Euclidean space.

Classical Analysis and ODEs · Mathematics 2008-11-11 Daniel M. Oberlin

We prove uniform $L^p \to L^q$ bounds for Fourier restriction to polynomial curves in $\mathbb R^d$ with affine arclength measure, in the conjectured range.

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

We establish lower bounds for the operator norms of the Fourier restriction/extension operators associated to monomial curves with affine arclength measure. Furthermore, we prove that the set of all extremizing sequences of such an operator…

Classical Analysis and ODEs · Mathematics 2024-11-19 Chandan Biswas , Betsy Stovall

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

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

A Fourier restriction estimate is obtained for a broad class of conic surfaces by adding a weight to the usual underlying measure. The new restriction estimate exhibits a certain affine-invariance and implies the sharp $L^p-L^q$ restriction…

Classical Analysis and ODEs · Mathematics 2019-02-20 Jonathan Hickman

Consider the group ${\mathbb{R}}^2$ with the discrete topology, and denote its Fourier algebra by $A({{\mathbb{R}}_{\rm d}^2})$. We reformulate a theorem of V.A. Yudin as a statement about restrictions of functions in $A({{\mathbb{R}}_{\rm…

Classical Analysis and ODEs · Mathematics 2014-07-14 John J. F. Fournier

We establish endpoint Lebesgue space bounds for convolution and restricted X-ray transforms along curves satisfying fairly minimal differentiability hypotheses, with affine and Euclidean arclengths. We also explore the behavior of certain…

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

We consider Fourier transforms of densities supported on curves in R^d. We obtain sharp lower and close to sharp upper bounds for the L^q decay rates.

Classical Analysis and ODEs · Mathematics 2010-03-15 Luca Brandolini , Giacomo Gigante , Allan Greenleaf , Alexander Iosevich , Andreas Seeger , Giancarlo Travaglini

We prove convolution estimates for affine arclength measure on certain flat curves in dimensions 2, 3, and 4.

Classical Analysis and ODEs · Mathematics 2009-11-10 Daniel M. Oberlin

We draw a connection between the affine invariant surface measures constructed by P. Gressman and the boundedness of a certain geometric averaging operator associated to surfaces of codimension $2$ and related to the Fourier Restriction…

Classical Analysis and ODEs · Mathematics 2025-02-12 Spyridon Dendrinos , Andrei Mustata , Marco Vitturi

We prove sharp $L^2$ Fourier restriction inequalities for compact, smooth surfaces in $\mathbb{R}^3$ equipped with the affine surface measure or a power thereof. The results are valid for all smooth surfaces and the bounds are uniform for…

Classical Analysis and ODEs · Mathematics 2024-11-08 Jianhui Li

We consider the convolution operator for a measure supported on complex curves. The measure which we consider here is an analogue of the affine arclength measure for real curves. By modifying a combinatorial argument called the band…

Classical Analysis and ODEs · Mathematics 2015-03-31 Hyunuk Chung , Seheon Ham

We establish optimal $(p,q)$ ranges for two types of estimates associated to three dimensional complex polynomial curves. These are the estimates for the weighted restriction of the Fourier Transform to a complex polynomial curve, and the…

Complex Variables · Mathematics 2020-12-18 Conor Meade

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

We study $L^p\to L^r$ estimates for restricted averaging operators related to algebraic varieties $V$ of $d$-dimensional vector spaces over finite fields $\mathbb F_q$ with $q$ elements. We observe properties of both the Fourier restriction…

Classical Analysis and ODEs · Mathematics 2016-09-02 Doowon Koh , Seongjun Yeom
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