English

Generalize Hilbert operator acting on Dirichlet spaces

Complex Variables 2022-08-03 v2

Abstract

Let μ\mu be a positive Borel measure on the interval [0,1)[0,1). For γ>0\gamma>0, the Hankel matrix Hμ,γ=(μn,k)n,k0\mathcal{H}_{\mu,\gamma}=(\mu_{n,k})_{n,k\geq0} with entries μn,k=μn+k\mu_{n,k}=\mu_{n+k}, where μn+k=0tn+kdμ(t)\mu_{n+k}=\int_{0}^{\infty}t^{n+k}d\mu(t). formally induces the operator Hμ,γ=n=0(k=0μn,kak)Γ(n+γ)n!Γ(γ)zn,\mathcal{H}_{\mu,\gamma}=\sum_{n=0}^{\infty}\left(\sum_{k=0}^{\infty}\mu_{n,k}a_k\right)\frac{\Gamma(n+\gamma)}{n!\Gamma(\gamma)}z^n, on the space of all analytic functions f(z)=k=0akzkf(z)=\sum_{k=0}^{\infty}{a_k}{z^k} in the unit disc D\mathbb{D}. Following ideas from \cite{author3} and \cite{author4}, in this paper, for 0α<20\leq\alpha<2, 2β<42\leq\beta<4, γ1\gamma\geq1. we characterize the measure μ\mu for which Hμ,γ\mathcal{H}_{\mu,\gamma} is bounded(resp.,compact)from Dα\mathcal{D}_{\alpha} into Dβ\mathcal{D}_{\beta}.

Keywords

Cite

@article{arxiv.2208.00951,
  title  = {Generalize Hilbert operator acting on Dirichlet spaces},
  author = {Liyun Zhao and Zhenyou Wang and Zhirong Su},
  journal= {arXiv preprint arXiv:2208.00951},
  year   = {2022}
}

Comments

7 pages

R2 v1 2026-06-25T01:23:13.155Z