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The Spectra of Algebras of Group-Symmetric Functions

Part of: Measures, integration, derivative, holomorphy Linear function spaces and their duals

Published online by Cambridge University Press:  29 November 2018

Domingo García ,
Manuel Maestre  and
Ignacio Zalduendo
Domingo García
Affiliation:
Departamento de Análisis Matemático, Universidad de Valencia, Valencia, Spain (domingo.garcia@uv.es; manuel.maestre@uv.es)
Manuel Maestre
Affiliation:
Departamento de Análisis Matemático, Universidad de Valencia, Valencia, Spain (domingo.garcia@uv.es; manuel.maestre@uv.es)
Ignacio Zalduendo
Affiliation:
Universidad Torcuato Di Tella. Av. Figueroa Alcorta 7350 (C1428BCW), Buenos Aires, Argentina (izalduendo@utdt.edu)
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Abstract

In the study of the spectra of algebras of holomorphic functions on a Banach space E, the bidual E″ has a central role, and the spectrum is often shown to be locally homeomorphic to E″. In this paper we consider the problem of spectra of subalgebras invariant under the action of a group (functions f such that f ○ g = f). It is natural to attempt a characterization in terms of the space of orbits E″/~ obtained from E″ through the action of the group, so we pursue this approach here and introduce an analytic structure on the spectrum in some situations. In other situations we encounter some obstacles: in some cases, the lack of structure of E″/~ itself; in others, problems of weak continuity and non-approximability of functions in the algebra. We also define a convolution operation related to the spectrum.

Keywords

symmetric polynomialgroup of operatorsholomorphic function

MSC classification

Primary: 46G20: Infinite-dimensional holomorphy
Secondary: 46E50: Spaces of differentiable or holomorphic functions on infinite-dimensional spaces
Type
Research Article
Information
Proceedings of the Edinburgh Mathematical Society , Volume 62 , Issue 3 , August 2019 , pp. 609 - 623
Copyright
Copyright © Edinburgh Mathematical Society 2018 

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