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Fredholm composition operators. (English) Zbl 0469.47023

MSC:
47B38 Linear operators on function spaces (general)
47A53 (Semi-) Fredholm operators; index theories
47B37 Linear operators on special spaces (weighted shifts, operators on sequence spaces, etc.)
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[1] M. B. Abrahamse and Thomas L. Kriete, The spectral multiplicity of a multiplication operator, Indiana Univ. Math. J. 22 (1972/73), 845 – 857. · Zbl 0259.47031
[2] Joseph A. Cima, James Thomson, and Warren Wogen, On some properties of composition operators, Indiana Univ. Math. J. 24 (1974/75), 215 – 220. · Zbl 0276.47038
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[6] Raj Kishor Singh, Normal and Hermitian composition operators, Proc. Amer. Math. Soc. 47 (1975), 348 – 350. · Zbl 0295.47026
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[8] R. K. Singh, Composition operators induced by rational functions, Proc. Amer. Math. Soc. 59 (1976), no. 2, 329 – 333. · Zbl 0315.47023
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[10] R. K. Singh and Ashok Kumar, Characterizations of invertible, unitary, and normal composition operators, Bull. Austral. Math. Soc. 19 (1978), no. 1, 81 – 95. · Zbl 0385.47017
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