Herv'e Queff'elec

activity

20092026

most citedApproximation numbers of composition operators on the

H^{2}

space of Dirichlet series

47 citations · 49 across the 9 of their papers we have counts for

collaborators

Showing 2023Show all

3 papers · 1 filter

math.CV2023★ 1 cited

Characterization of weighted Hardy spaces on which all composition operators are bounded

Pascal Lefèvre, Daniel Li, Hervé Queffélec +1

We give a complete characterization of the sequences $β = (β_{n})$ of positive numbers for which all composition operators on $H^{2} (β)$ are bounded, where $H^{2} (β)$ is the space of an…

math.FA2023

On some questions about composition operators on weighted Hardy spaces

Pascal Lefèvre, Daniel Li, Hervé Queffélec +1

We first consider some questions raised by N. Zorboska in her thesis. In particular she asked for which sequences $β$ every symbol $φ : D \to D$ with $φ\in H^…

math.FA2023

Old and new results on the Furstenberg sets

Aihua Fan, Hervé Queffélec, Martine Quffélec

This paper is a complement to our previous paper [21]. It surveys the works on the Furstenberg set $S = {2^{m} 3^{n} : n \geq 0, m \geq 0}$ and its random version $T$ . We also present so…