S. Richter

activity

20012026

most citedThe Smirnov class for spaces with the complete Pick property

38 citations · 145 across the 21 of their papers we have counts for

collaborators

29 papers

math.FA2026

Cyclicity via weak $^{*}$ sequential cyclicity in Radially weighted Besov spaces

Anusrika Datta, Stefan Richter

A radially weighted Besov space $H$ is a space of holomorphic functions on the unit ball $B_{d} \subseteq C^{d}$ whose $N$ -th radial derivative is square integrable w…

math.CV2025

Inner factors of Dirichlet space functions

Michael Hartz, Stefan Richter

Every function in the Dirichlet space on the unit disc has an inner/outer factorization. We study which inner functions occur in this way. For Blaschke products, this is the well k…

math.FA2024

Cyclicity and iterated logarithms in the Dirichlet space

Alexandru Aleman, Stefan Richter

Let $D (μ)$ denote a harmonically weighted Dirichlet space on the unit disc $D$ . We show that outer functions $f \in D (μ)$ are cyclic in $D (μ)$ , whenever $lo g f$ belongs to…

math.FA2023

Cyclicity and iterated logarithms in the Drury-Arveson space

Alexandru Aleman, Karl-Mikael Perfekt, Stefan Richter +2

Let $H_{d}^{2}$ be the Drury-Arveson space, and let $f \in H_{d}^{2}$ have bounded argument and no zeros in $B_{d}$ . We show that $f$ is cyclic in $H_{d}^{2}$ if and only if $lo g f$ bel…

math.FA2023

Cyclicity in the Drury-Arveson space and other weighted Besov spaces

Alexandru Aleman, Karl-Mikael Perfekt, Stefan Richter +2

Let $H$ be a space of analytic functions on the unit ball $B_{d}$ in $C^{d}$ with multiplier algebra $Mult (H)$ . A function $f\in \mathcal{H…

math.FA2022

Multivariable versions of a lemma of Kaluza's

Stefan Richter, Jesse Sautel

Let $d \in N$ and $f (z) = \sum_{α \in N_{0}^{d}} c_{α} z^{α}$ be a convergent multivariable power series in $z = (z_{1}, \dots, z_{d})$ . In this paper we present two conditions on th…