Abstract
Assume that H is separable, and argue that it is enough to prove the existence of two orthogonal reducing subspaces of infinite dimension. Prove it by the consideration of spectral measures.
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© 1982 Springer-Verlag New York Inc.
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Halmos, P.R. (1982). Unilateral Shift. In: A Hilbert Space Problem Book. Graduate Texts in Mathematics, vol 19. Springer, New York, NY. https://doi.org/10.1007/978-1-4684-9330-6_42
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DOI: https://doi.org/10.1007/978-1-4684-9330-6_42
Publisher Name: Springer, New York, NY
Print ISBN: 978-1-4684-9332-0
Online ISBN: 978-1-4684-9330-6
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