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Proceedings of the American Mathematical Society

Published by the American Mathematical Society since 1950, Proceedings of the American Mathematical Society is devoted to shorter research articles in all areas of pure and applied mathematics.

ISSN 1088-6826 (online) ISSN 0002-9939 (print)

The 2020 MCQ for Proceedings of the American Mathematical Society is 0.85.

What is MCQ? The Mathematical Citation Quotient (MCQ) measures journal impact by looking at citations over a five-year period. Subscribers to MathSciNet may click through for more detailed information.

 

The role of zero sets in the spectra of hyponormal operators
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by C. R. Putnam PDF
Proc. Amer. Math. Soc. 43 (1974), 137-140 Request permission

Abstract:

A compact set in the complex plane is the spectrum of a completely hyponormal operator if and only if the set has positive density.
References
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Additional Information
  • © Copyright 1974 American Mathematical Society
  • Journal: Proc. Amer. Math. Soc. 43 (1974), 137-140
  • MSC: Primary 47B20
  • DOI: https://doi.org/10.1090/S0002-9939-1974-0333808-6
  • MathSciNet review: 0333808