English

Quadratic sparse domination and Weighted Estimates for non-integral Square Functions

Classical Analysis and ODEs 2023-11-07 v1

Abstract

We prove a quadratic sparse domination result for general non-integral square functions SS. That is, we prove an estimate of the form \begin{equation*} \int_{M} (S f)^{2} g \, \mathrm{d}\mu \le c \sum_{P \in \mathcal{S}} \left(\frac{1}{\lvert 5P \rvert}\int_{5 P} \lvert f\rvert^{p_{0}} \, \mathrm{d}\mu\right)^{2/p_{0}} \left(\frac{1}{\lvert 5P \rvert} \int_{5 P} \lvert g\rvert^{q_{0}^*}\,\mathrm{d}\mu\right)^{1/q_{0}^*} \lvert P\rvert, \end{equation*} where q0q_{0}^{*} is the H\"{o}lder conjugate of q0/2q_{0}/2, MM is the underlying doubling space and S\mathcal{S} is a sparse collection of cubes on MM. Our result will cover both square functions associated with divergence form elliptic operators and those associated with the Laplace-Beltrami operator. This sparse domination allows us to derive optimal norm estimates in the weighted space Lp(w)L^{p}(w).

Keywords

Cite

@article{arxiv.2007.15928,
  title  = {Quadratic sparse domination and Weighted Estimates for non-integral Square Functions},
  author = {Julian Bailey and Gianmarco Brocchi and Maria Carmen Reguera},
  journal= {arXiv preprint arXiv:2007.15928},
  year   = {2023}
}

Comments

31 pages

R2 v1 2026-06-23T17:33:01.706Z