English

Polynomial approach to cyclicity for weighted $\ell^p_A$

Classical Analysis and ODEs 2020-06-08 v2 Complex Variables Functional Analysis

Abstract

In previous works, an approach to the study of cyclic functions in reproducing kernel Hilbert spaces has been presented, based on the study of so called \emph{optimal polynomial approximants}. In the present article, we extend such approach to the (non-Hilbert) case of spaces of analytic functions whose Taylor coefficients are in p(ω)\ell^p(\omega), for some weight ω\omega. When ω={(k+1)α}kN\omega=\{(k+1)^\alpha\}_{k\in \mathbb{N}}, for a fixed αR\alpha \in \mathbb{R}, we derive a characterization of the cyclicity of polynomial functions and, when 1<p<1<p<\infty, we obtain sharp rates of convergence of the optimal norms.

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Cite

@article{arxiv.2001.02130,
  title  = {Polynomial approach to cyclicity for weighted $\ell^p_A$},
  author = {Daniel Seco and Roberto Téllez},
  journal= {arXiv preprint arXiv:2001.02130},
  year   = {2020}
}

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Major revision

R2 v1 2026-06-23T13:05:08.932Z