Equality of two spectra arising in harmonic analysis and semigroup theory

Citation
R. Chill et E. Fasangova, Equality of two spectra arising in harmonic analysis and semigroup theory, P AM MATH S, 130(3), 2001, pp. 675-681
Citations number
11
Categorie Soggetti
Mathematics
Journal title
PROCEEDINGS OF THE AMERICAN MATHEMATICAL SOCIETY
ISSN journal
00029939 → ACNP
Volume
130
Issue
3
Year of publication
2001
Pages
675 - 681
Database
ISI
SICI code
0002-9939(2001)130:3<675:EOTSAI>2.0.ZU;2-H
Abstract
We show that a new notion of a spectrum of a function u is an element of L- infinity(R+, X) (X is a Banach space), defined by B. Basit and the first au thor, coincides with the Arveson spectrum of some shift group, provided u i s uniformly continuous. We apply this result to prove a new version of a ta uberian theorem.