English

Hilbert-type operator induced by radial weight

Complex Variables 2026-02-16 v3 Functional Analysis

Abstract

We consider the Hilbert-type operator defined by Hω(f)(z)=01f(t)(1z0zBtω(u)du)ω(t)dt, H_{\omega}(f)(z)=\int_0^1 f(t)\left(\frac{1}{z}\int_0^z B^{\omega}_t(u)\,du\right)\,\omega(t)dt, where {Bζω}ζD\{B^{\omega}_\zeta\}_{\zeta\in\mathbb{D}} are the reproducing kernels of the Bergman space Aω2A^2_\omega induced by a radial weight ω\omega in the unit disc D\mathbb{D}. We prove that HωH_{\omega} is bounded from HH^\infty to the Bloch space if and only if ω\omega belongs to the class D^\widehat{\mathcal{D}}, which consists of radial weights ω\omega satisfying the doubling condition sup0r<1r1ω(s)ds1+r21ω(s)ds<\sup_{0\le r<1} \frac{\int_r^1 \omega(s)\,ds}{\int_{\frac{1+r}{2}}^1\omega(s)\,ds}<\infty. Further, we describe the weights ωD^\omega\in \widehat{\mathcal{D}} such that HωH_\omega is bounded on the Hardy space H1H^1, and we show that for any ωD^\omega\in \widehat{\mathcal{D}} and p(1,)p\in (1,\infty), Hω:L[0,1)pHpH_\omega:\,L^p_{[0,1)} \to H^p is bounded if and only if the Muckenhoupt type condition \begin{equation*} \sup\limits_{0<r<1}\left(1+\int_0^r \frac{1}{\widehat{\omega}(t)^p} dt\right)^{\frac{1}{p}} \left(\int_r^1 \omega(t)^{p'}\,dt\right)^{\frac{1}{p'}} <\infty, \end{equation*} holds. Moreover, we address the analogous question about the action of HωH_{\omega} on weighted Bergman spaces AνpA^p_\nu.

Keywords

Cite

@article{arxiv.2007.15402,
  title  = {Hilbert-type operator induced by radial weight},
  author = {José Ángel Peláez and Elena de la Rosa},
  journal= {arXiv preprint arXiv:2007.15402},
  year   = {2026}
}

Comments

Accepted manuscript (postprint)

R2 v1 2026-06-23T17:31:33.755Z