English

Uniform Fourier restriction for convex curves

Classical Analysis and ODEs 2024-08-15 v2

Abstract

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 curve. The improvement over M\"{u}ller, Ricci, and Wright and Ramos is given by the removal of the C2\mathcal{C}^2 regularity condition on the curve. This requires the choice of an appropriate measure for each curve, that is suggested by an affine invariant construction of Oberlin in \cite{MR1960918}. As corollaries, we obtain a uniform Fourier restriction theorem for arbitrary convex curves, and a result on the Lebesgue points of the Fourier transform on the curve.

Keywords

Cite

@article{arxiv.2111.06874,
  title  = {Uniform Fourier restriction for convex curves},
  author = {Marco Fraccaroli},
  journal= {arXiv preprint arXiv:2111.06874},
  year   = {2024}
}

Comments

v2: 29 pages, 6 figures. Additional references, clarifying comment in proof of Lemma 4.2 Case II, and lemmata A.17--19 and figure 6 to improve exposition of proof of Thm 2.5 in Appendix. No changes to results or proofs