Stability properties of ultraholomorphic classes of Roumieu-type defined by weight matrices

Gerhard Schindl, Javier Sanz (Korresp. Autor*in), Javier Jiménez-Garrido, Ignacio Miguel-Cantero

Veröffentlichungen: Beitrag in FachzeitschriftArtikelPeer Reviewed


We characterize several stability properties, such as inverse or composition closedness, for ultraholomorphic function classes of Roumieu type defined in terms of a weight matrix. In this way we transfer and extend known results from J. Siddiqi and M. Ider, from the weight sequence setting and in sectors not wider than a half-plane, to the weight matrix framework and for sectors in the Riemann surface of the logarithm with arbitrary opening. The key argument rests on the construction, under suitable hypotheses, of characteristic functions in these classes for unrestricted sectors. As a by-product, we obtain new stability results when the growth control in these classes is expressed in terms of a weight sequence, or of a weight function in the sense of Braun–Meise–Taylor.

FachzeitschriftRevista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A. Matematicas. RACSAM
Frühes Online-Datum6 Apr. 2024
PublikationsstatusVeröffentlicht - Juli 2024

ÖFOS 2012

  • 101002 Analysis