Shift invariant subspaces of composition operators.

Jones, Matthew (2005) Shift invariant subspaces of composition operators. Archiv der Mathematik, 84 (3). pp. 258-267. ISSN 1420-8938

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Let C denote the composition operator defined on the standard Hardy spaces Hp as where is an analytic self-map of the unit disk in the complex plane. In this paper we discuss those invariant subspaces of C in Hp which are invariant under the shift operator, We restrict our attention to the case where is an inner function. Our main result characterises these invariant subspaces. We also consider C when restricted to such an invariant subspace and we describe the structure of the operator and find a formula for the essential spectral radius.

Item Type:Article
Research Areas:A. > Business School > Economics
A. > School of Science and Technology > Design Engineering and Mathematics
Citations on ISI Web of Science:2
ID Code:633
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Deposited On:02 Dec 2008 17:31
Last Modified:17 Mar 2015 18:33

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