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A characterization of subnormal pairs. (English) Zbl 0943.47018

Gheondea, A. (ed.) et al., Operator theory, operator algebras and related topics. Proceedings of the 16th international conference on operator theory, Timişoara, Romania, July 2-10, 1996. Bucharest: The Theta Foundation. 149-157 (1997).
Summary: We give new conditions of characterization for subnormality of a pair of operators and more generally, of a semigroup of operators on a Hilbert space.
For the entire collection see [Zbl 0917.00013].

MSC:

47B20 Subnormal operators, hyponormal operators, etc.
47D03 Groups and semigroups of linear operators
47A57 Linear operator methods in interpolation, moment and extension problems
47A20 Dilations, extensions, compressions of linear operators

Citations:

Zbl 0917.00013
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