Hermitian and algebraic *-algebras,representable extensions of positive functionals

Szűcs, Zsolt [Szűcs, Zsolt (matematika), author] Department of Differential Equations (BUTE / FNS / IM); Takács, Balázs [Takács, Balázs (funkcionálanalízis), author] Alkalmazott Kvantitatív Módszertan Tanszék (BUEB / PSZK)

English Article (Journal Article) Scientific
Published: STUDIA MATHEMATICA 0039-3223 1730-6337 256 (3) pp. 311-343 2021
  • SJR Scopus - Mathematics (miscellaneous): Q1
Subjects:
  • Mathematics
We introduce the concept of E*-algebras in the context of representable extensions of positive functionals, and we show that the class of E*-algebras coincides with the class of hermitian algebraic *-algebras. Results on Banach E*-algebras and preC*-algebras which are E*-algebras are also included.As applications we give a characterization of discrete locally finite groups via E*algebras and answer Kurosh's problem in the affirmative in the case of the convolution *-algebras of compactly supported continuous functions on an arbitrary locally compact group.
Citation styles: IEEEACMAPAChicagoHarvardCSLCopyPrint
2026-04-19 23:13