English

T1 theorem for Campanato spaces on domains

Functional Analysis 2017-11-28 v1

Abstract

Given a Lipschitz domain DRd,D\subset \mathbb{R}^d, a Calder\'on-Zygmund operator TT and a modulus of continuity ω(x),\omega(x), we solve a problem when the restricted operator TDf=T(fχD)χDT_Df=T(f\chi_D)\chi_D sends the Campanato space Cω(D)\mathcal{C}_\omega(D) into itself. The solution is a T1 type sufficient and necessary condition for the characteristic function χD\chi_D of DD: (TχD)χDCω~(D),(T\chi_D)\chi_D \in \mathcal{C}_{\tilde{\omega}}(D), assumed ω~(x)=ω(x)/x1ω(t)dt/t.\tilde{\omega}(x)= \omega(x)/\int_x^1 \omega(t)dt/t. To check the hypotheses of T1 theorem we need extra restrictions on both the boundary of DD and the operator T.T. It is proved that the restricted Calder\'on-Zygmund operator TDT_D with the even kernel is bounded on Cω(D),\mathcal{C}_\omega(D), provided DD be C1,ω~C^{1,\tilde{\omega}}-smooth domain. This result is sharp.

Keywords

Cite

@article{arxiv.1711.09303,
  title  = {T1 theorem for Campanato spaces on domains},
  author = {Andrei V. Vasin},
  journal= {arXiv preprint arXiv:1711.09303},
  year   = {2017}
}

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20 pages