Subnormal semigroups of composition operators

Giménez, José

doi:10.1090/S0002-9939-04-07686-5

Subnormal semigroups of composition operators
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Proc. Amer. Math. Soc. 133 (2005), 1749-1756 Request permission

Abstract:

In this article we describe a model for subnormal semigroups of composition operators (with linear fractional symbol) acting on the Hardy space $H^2$. We also discuss cyclicity of such semigroups in the context of more general results studied by J. H. Shapiro and P. S. Bourdon.

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