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On the normal spectrum of a subnormal operator


Authors: J. W. Bunce and J. A. Deddens
Journal: Proc. Amer. Math. Soc. 63 (1977), 107-110
MSC: Primary 47B20; Secondary 46L05
DOI: https://doi.org/10.1090/S0002-9939-1977-0435912-3
MathSciNet review: 0435912
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Abstract: In this note we present a new characterization for subnormality which is purely $ {C^ \ast }$-algebraic. We also establish an intrinsic characterization of the normal spectrum for a subnormal operator, which enables us to prove that $ {\sigma _ \bot }(\pi (S)) \subseteq {\sigma _ \bot }(S)$ for any $ ^ \ast $-representation $ \pi $.


References [Enhancements On Off] (What's this?)

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Additional Information

DOI: https://doi.org/10.1090/S0002-9939-1977-0435912-3
Keywords: Subnormal operator, normal spectrum, $ {C^ \ast }$-algebra
Article copyright: © Copyright 1977 American Mathematical Society

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