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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.

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Every isometry is reflexive
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by James A. Deddens PDF
Proc. Amer. Math. Soc. 28 (1971), 509-512 Request permission

Abstract:

A bounded linear operator $A$ on a Hilbert space $\mathcal {H}$ is called reflexive if any bounded linear operator which leaves invariant the invariant subspaces of $A$ is a limit of polynomials in $A$ in the weak operator topology. In this note we prove that every isometry $V$ on a Hilbert space $\mathcal {H}$ is reflexive.
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Additional Information
  • © Copyright 1971 American Mathematical Society
  • Journal: Proc. Amer. Math. Soc. 28 (1971), 509-512
  • MSC: Primary 47.35
  • DOI: https://doi.org/10.1090/S0002-9939-1971-0278099-7
  • MathSciNet review: 0278099