English

Weak-type (1,1) estimates for strongly singular operators

Classical Analysis and ODEs 2019-01-08 v2

Abstract

Let ψ\psi be a positive function defined near the origin such that limt0+ψ(t)=0\lim_{t\to 0^{+}}\psi(t)=0. We consider the operator \begin{equation*} T_\theta f(x) = \lim_{\varepsilon\to 0^+} \int_\varepsilon^1 e^{i\gamma(t)}f(x-t) \frac{dt}{t^{\theta}\psi(t)^{1-\theta}}, \end{equation*} where γ\gamma is a real function with limt0+γ(t)=\lim_{t\to 0^+}|\gamma(t)| = \infty and 0θ10 \le \theta \le 1. Assuming certain regularity and growth conditions on ψ\psi and γ\gamma, we show that T1T_1 is of weak type (1,1)(1,1).

Keywords

Cite

@article{arxiv.1802.04767,
  title  = {Weak-type (1,1) estimates for strongly singular operators},
  author = {Magali Folch-Gabayet and Ricardo A. Sáenz},
  journal= {arXiv preprint arXiv:1802.04767},
  year   = {2019}
}

Comments

10 pages

R2 v1 2026-06-23T00:21:17.356Z