Subnormal operators with compact selfcommutator |
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Authors: | Alexandru Aleman |
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Institution: | 1. Fachbereich Mathematik, Fern Universit?t Hagen, 58054, Hagen, Germany
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Abstract: | For an arbitrary subnormal operator we estimate the essential norm and trace of commutators of the form T
u, S], whereT
u is a Toeplitz operator with continuous symbol. In particular, we obtain criteria for the compactness of S
*,S]. The trace estimates apply to multiplication operators on Hardy spaces over general domains. |
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Keywords: | |
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