Optimal Weighted Fourier Restriction Estimates for the Sphere in 2D

Abstract We prove weighted versions of the 2D Restriction Conjecture for the unit sphere in $${\mathbb {R}}^2$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mrow> <mml:mi>R</mml:mi> </mml:mrow> <mml:mn>2</mml:mn> </mml:msup> </mml:math> . Our results involve the weight functions $$(1+|x|)^\alpha (1+|y|)^\beta $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msup> <mml:mrow> <mml:mo>(</mml:mo> <mml:mn>1</mml:mn> <mml:mo>+</mml:mo> <mml:mo>|</mml:mo> <mml:mi>x</mml:mi> <mml:mo>|</mml:mo> <mml:mo>)</mml:mo> </mml:mrow> <mml:mi>α</mml:mi> </mml:msup> <mml:msup> <mml:mrow> <mml:mo>(</mml:mo> <mml:mn>1</mml:mn> <mml:mo>+</mml:mo> <mml:mo>|</mml:mo> <mml:mi>y</mml:mi> <mml:mo>|</mml:mo> <mml:mo>)</mml:mo> </mml:mrow> <mml:mi>β</mml:mi> </mml:msup> </mml:mrow> </mml:math> and $$(1+|x|+|y|)^\gamma $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mrow> <mml:mo>(</mml:mo> <mml:mn>1</mml:mn> <mml:mo>+</mml:mo> <mml:mo>|</mml:mo> <mml:mi>x</mml:mi> <mml:mo>|</mml:mo> <mml:mo>+</mml:mo> <mml:mo>|</mml:mo> <mml:mi>y</mml:mi> <mml:mo>|</mml:mo> <mml:mo>)</mml:mo> </mml:mrow> <mml:mi>γ</mml:mi> </mml:msup> </mml:math> with $$\alpha ,\beta ,\gamma \ge 0$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>α</mml:mi> <mml:mo>,</mml:mo> <mml:mi>β</mml:mi> <mml:mo>,</mml:mo> <mml:mi>γ</mml:mi> <mml:mo>≥</mml:mo> <mml:mn>0</mml:mn> </mml:mrow> </mml:math> .

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Publication Details

Journal
Journal of Fourier Analysis and Applications
Published
2025-11-21
DOI
https://doi.org/10.1007/s00041-025-10207-1
Primary Topic
Advanced Harmonic Analysis Research
Type
article
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article

Optimal Weighted Fourier Restriction Estimates for the Sphere in 2D

Rainer Mandel
Journal of Fourier Analysis and Applications
Advanced Harmonic Analysis Research
article

Optimal Weighted Fourier Restriction Estimates for the Sphere in 2D

Rainer Mandel
article en

Abstract

Abstract We prove weighted versions of the 2D Restriction Conjecture for the unit sphere in $${\mathbb {R}}^2$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mrow> <mml:mi>R</mml:mi> </mml:mrow> <mml:mn>2</mml:mn> </mml:msup> </mml:math> . Our results involve the weight functions $$(1+|x|)^\alpha (1+|y|)^\beta $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msup> <mml:mrow> <mml:mo>(</mml:mo> <mml:mn>1</mml:mn> <mml:mo>+</mml:mo> <mml:mo>|</mml:mo> <mml:mi>x</mml:mi> <mml:mo>|</mml:mo> <mml:mo>)</mml:mo> </mml:mrow> <mml:mi>α</mml:mi> </mml:msup> <mml:msup> <mml:mrow> <mml:mo>(</mml:mo> <mml:mn>1</mml:mn> <mml:mo>+</mml:mo> <mml:mo>|</mml:mo> <mml:mi>y</mml:mi> <mml:mo>|</mml:mo> <mml:mo>)</mml:mo> </mml:mrow> <mml:mi>β</mml:mi> </mml:msup> </mml:mrow> </mml:math> and $$(1+|x|+|y|)^\gamma $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mrow> <mml:mo>(</mml:mo> <mml:mn>1</mml:mn> <mml:mo>+</mml:mo> <mml:mo>|</mml:mo> <mml:mi>x</mml:mi> <mml:mo>|</mml:mo> <mml:mo>+</mml:mo> <mml:mo>|</mml:mo> <mml:mi>y</mml:mi> <mml:mo>|</mml:mo> <mml:mo>)</mml:mo> </mml:mrow> <mml:mi>γ</mml:mi> </mml:msup> </mml:math> with $$\alpha ,\beta ,\gamma \ge 0$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>α</mml:mi> <mml:mo>,</mml:mo> <mml:mi>β</mml:mi> <mml:mo>,</mml:mo> <mml:mi>γ</mml:mi> <mml:mo>≥</mml:mo> <mml:mn>0</mml:mn> </mml:mrow> </mml:math> .

Journal of Fourier Analysis and ApplicationsVol. 31(6)
Karlsruhe Institute of Technology (DE)
Openalex Percentile: Top 52%
Advanced Harmonic Analysis Research
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Optimal Weighted Fourier Restriction Estimates for the Sphere in 2D — Rainer Mandel · Journal of Fourier Analysis and Applications (2025) | TGRS Research Map | TGRS