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Related papers: Local smoothing estimates for bilinear Fourier int…

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The theory of Fourier integral operators is surveyed, with an emphasis on local smoothing estimates and their applications. After reviewing the classical background, we describe some recent work of the authors which established sharp local…

Analysis of PDEs · Mathematics 2019-09-06 David Beltran , Jonathan Hickman , Christopher D. Sogge

We prove a variable coefficient version of the square function estimate of Guth--Wang--Zhang. By a classical argument of Mockenhaupt--Seeger--Sogge, it implies the full range of sharp local smoothing estimates for $2+1$ dimensional Fourier…

Analysis of PDEs · Mathematics 2023-04-11 Chuanwei Gao , Bochen Liu , Changxing Miao , Yakun Xi

We establish certain square function estimates for a class of oscillatory integral operators with homogeneous phase functions. These results are employed to deduce a refinement of a previous result of Mockenhaupt Seeger and Sogge…

Analysis of PDEs · Mathematics 2019-01-23 Chuanwei Gao , Changxing Miao , Jianwei-Urbain Yang

We give a proof of Fourier extension conjecture on the paraboloid in all dimensions bigger than 2 that begins with a decomposition suggested in Sawyer [Saw8] of writing a smooth Alpert projection as a sum of pieces whose Fourier extensions…

Classical Analysis and ODEs · Mathematics 2026-05-19 Cristian Rios , Eric T. Sawyer

We prove the higher-dimensional analogue of Wolff's local smoothing estimate (Geom. Funct. Anal. 2001) for large p. As in the 2+1-dimensional case, the estimate is sharp for any given value of p, but it is likely that the range of p can be…

Classical Analysis and ODEs · Mathematics 2007-05-23 I. Laba , T. Wolff

We show that the Hardy spaces for Fourier integral operators form natural spaces of initial data when applying $\ell^{p}$-decoupling inequalities to local smoothing for the wave equation. This yields new local smoothing estimates which, in…

Analysis of PDEs · Mathematics 2022-11-24 Jan Rozendaal

We prove that bilinear fractional integral operators and similar multipliers are smoothing in the sense that they improve the regularity of functions. We also treat bilinear singular multiplier operators which preserve regularity and obtain…

Classical Analysis and ODEs · Mathematics 2017-01-11 Jarod Hart , Rodolfo H. Torres , Xinfeng Wu

In this short note, we prove a refinement of bilinear local smoothing estimate to Airy solutions, when the frequency support of two wave are separated. As an application we prove a smoothing property of a bilinear form.

Analysis of PDEs · Mathematics 2011-08-03 Soonsik Kwon , Tristan Roy

We introduce the Hardy spaces for Fourier integral operators on Riemannian manifolds with bounded geometry. We then use these spaces to obtain improved local smoothing estimates for Fourier integral operators satisfying the cinematic…

Analysis of PDEs · Mathematics 2024-01-31 Naijia Liu , Jan Rozendaal , Liang Song , Lixin Yan

We establish the regularity of bilinear Fourier integral operators with bilinear amplitudes in $S^m_{1,0} (n,2)$ and non-degenerate phase functions, from $L^p \times L^q \to L^r$ under the assumptions that $m\leq…

Analysis of PDEs · Mathematics 2014-02-10 Salvador Rodríguez-López , David Rule , Wolfgang Staubach

The local $L^2$-mapping property of Fourier integral operators has been established in H\"ormander \cite{H} and in Eskin \cite{E}. In this paper, we treat the global $L^2$-boundedness for a class of operators that appears naturally in many…

Analysis of PDEs · Mathematics 2007-05-23 Michael Ruzhansky , Mitsuru Sugimoto

We prove sharp local smoothing estimates for wave equations on compact Riemannian manifolds in $n+1$ dimensions for odd $n$ and obtain improved estimates in even dimensions. This is achieved by deriving local smoothing estimates for certain…

Analysis of PDEs · Mathematics 2026-01-06 Shengwen Gan , Danqing He , Xiaochun Li , Shukun Wu

Given a hypersurface $S\subset \mathbb{R}^{2d}$, we study the bilinear averaging operator that averages a pair of functions over $S$, as well as more general bilinear multipliers of limited decay and various maximal analogs. Of particular…

Classical Analysis and ODEs · Mathematics 2023-11-30 Tainara Borges , Benjamin Foster , Yumeng Ou

The boundedness of the bilinear fractional integral operator is investigated. This bilinear fractional integral operator goes back to Kenig and Stein. This paper is oriented to the boundedness of this operator on products of Morrey spaces.…

Functional Analysis · Mathematics 2019-04-02 Naoya Hatano , Yoshihiro Sawano

The purpose of this paper is to improve the known estimates for Mockenhaupt's square function in $\mathbb R^3$ and for Sogge's local smoothing in $\mathbb R^{2+1}$ spacetime. For this we use the trilinear approach of S. Lee and A. Vargas…

Classical Analysis and ODEs · Mathematics 2018-05-29 Jungjin Lee

We consider some bilinear Fourier multiplier operators and give a bilinear version of Seeger, Sogge, and Stein's result for Fourier integral operators. Our results improve, for the case of Fourier multiplier operators, Rodr\'iguez-L\'opez,…

Classical Analysis and ODEs · Mathematics 2023-05-30 Tomoya Kato , Akihiko Miyachi , Naohito Tomita

We prove a variant of the so-called bilinear embedding theorem for operators in divergence form with complex coefficients and with nonnegative locally integrable potentials, subject to mixed boundary conditions, and acting on arbitrary open…

Analysis of PDEs · Mathematics 2023-02-27 Andrea Carbonaro , Oliver Dragičević

In this paper, we establish a local smoothing estimate on two-dimensional quantum Euclidean space. This is the noncommutative analogue of the one due to Mockenhaupt$-$Seeger$-$Sogge \cite{MSS}. As an application and simultaneously one…

Functional Analysis · Mathematics 2025-03-13 Guixiang Hong , Xudong Lai , Liang Wang

We show some new local smoothing estimates of the fractional Schr\"odinger equations with initial data in $\alpha$-modulation spaces via decoupling inequalities. Furthermore, our necessary conditions show that the local smoothing estimates…

Analysis of PDEs · Mathematics 2022-08-16 Yufeng Lu

We derive sparse bounds for the bilinear spherical maximal function in any dimension $d\geq 1$. When $d\geq 2$, this immediately recovers the sharp $L^p\times L^q\to L^r$ bound of the operator and implies quantitative weighted norm…

Classical Analysis and ODEs · Mathematics 2022-12-16 Tainara Borges , Benjamin Foster , Yumeng Ou , Jill Pipher , Zirui Zhou
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