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A characterization of the Browder spectrum


Author: Norberto Salinas
Journal: Proc. Amer. Math. Soc. 38 (1973), 369-373
MSC: Primary 47A55
DOI: https://doi.org/10.1090/S0002-9939-1973-0313852-4
MathSciNet review: 0313852
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Abstract: Several different notions of essential spectra are known. This paper is devoted to giving an equivalent definition of the Browder essential spectrum for bounded operators on Hilbert space. Also, it is shown that the set of all operators with essentially disconnected spectrum is a uniformly dense set.


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Additional Information

DOI: https://doi.org/10.1090/S0002-9939-1973-0313852-4
Keywords: Compression to subspaces of finite codimension, polynomial hull of the Browder spectrum
Article copyright: © Copyright 1973 American Mathematical Society

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