Characterizations of invertible, unitary, and normal composition operators. (English) Zbl 0385.47017


47B38 Linear operators on function spaces (general)
47B15 Hermitian and normal operators (spectral measures, functional calculus, etc.)
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[1] Singh, Bull. Austral. Math. Soc. 16 pp 247– (1977)
[2] DOI: 10.2307/2041495 · Zbl 0315.47023 · doi:10.2307/2041495
[3] DOI: 10.2307/2040611 · Zbl 0289.47016 · doi:10.2307/2040611
[4] DOI: 10.2307/1996402 · doi:10.2307/1996402
[5] Halmos, A Hilbert space problem book (1967)
[6] Halmos, Measure theory (1950) · doi:10.1007/978-1-4684-9440-2
[7] Sikorski, Boolean algebras 25 (1969) · doi:10.1007/978-3-642-85820-8
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