English

Random interpolating sequences in Dirichlet spaces

Complex Variables 2020-09-28 v3

Abstract

We discuss random interpolation in weighted Dirichlet spaces Dα\mathcal{D}_\alpha, 0α10\leq \alpha\leq 1. While conditions for deterministic interpolation in these spaces depend on capacities which are very hard to estimate in general, we show that random interpolation is driven by surprisingly simple distribution conditions. As a consequence, we obtain a breakpoint at α=1/2\alpha=1/2 in the behavior of these random interpolating sequences showing more precisely that almost sure interpolating sequences for Dα\mathcal{D}_\alpha are exactly the almost sure separated sequences when 0α<1/20\le \alpha<1/2 (which includes the Hardy space H2=D0H^2=\mathcal{D}_0), and they are exactly the almost sure zero sequences for Dα\mathcal{D}_\alpha when 1/2α11/2 \leq \alpha\le 1 (which includes the classical Dirichlet space D=D1\mathcal{D}=\mathcal{D}_1).

Keywords

Cite

@article{arxiv.1904.12529,
  title  = {Random interpolating sequences in Dirichlet spaces},
  author = {Nikolaos Chalmoukis and Andreas Hartmann and Karim Kellay and Brett Wick},
  journal= {arXiv preprint arXiv:1904.12529},
  year   = {2020}
}

Comments

With respect to previous versions of this paper we have clarified the situation of the breakpoint $\alpha=1/2$ as well as the endpoint case of the classical Dirichlet space $\mathcal{D}$. All the main results are now sharp

R2 v1 2026-06-23T08:51:59.462Z