English

Sparse bounds for maximal oscillatory rough singular integral operators

Classical Analysis and ODEs 2023-03-02 v1 Analysis of PDEs

Abstract

We prove sparse bounds for maximal oscillatory rough singular integral operator TΩ,Pf(x):=supϵ>0xy>ϵeιP(x,y)Ω((xy)/xy)xynf(y)dy,T^{P}_{\Omega,*}f(x):=\sup_{\epsilon>0} \left|\int_{|x-y|>\epsilon}e^{\iota P(x,y)}\frac{\Omega\big((x-y)/|x-y|\big)}{|x-y|^{n}}f(y)dy\right|, where P(x,y)P(x,y) is a real-valued polynomial on Rn×Rn\mathbb{R}^{n}\times \mathbb{R}^{n} and ΩL(Sn1)\Omega\in L^{\infty}(\mathbb{S}^{n-1}) is a homogeneous function of degree zero with Sn1Ω(θ) dθ=0\int_{\mathbb{S}^{n-1}}\Omega(\theta)~d\theta=0. This allows us to conclude weighted LpL^p-estimates for the operator TΩ,PT^{P}_{\Omega,*}. Moreover, the norm TΩ,PLpLp\|T^P_{\Omega,*}\|_{L^p\rightarrow L^p} depends only on the total degree of the polynomial P(x,y)P(x,y), but not on the coefficients of P(x,y)P(x,y). Finally, we will show that these techniques also apply to obtain sparse bounds for oscillatory rough singular integral operator TΩPT^{P}_{\Omega} for ΩLq(Sn1)\Omega\in L^{q}(\mathbb{S}^{n-1}), 1<q1<q\leq\infty.

Keywords

Cite

@article{arxiv.2303.00594,
  title  = {Sparse bounds for maximal oscillatory rough singular integral operators},
  author = {Surjeet Singh Choudhary and Saurabh Shrivastava and Kalachand Shuin},
  journal= {arXiv preprint arXiv:2303.00594},
  year   = {2023}
}
R2 v1 2026-06-28T08:54:29.163Z