Camara, MC and Partington, JR (2016) Finite-dimensional Toeplitz kernels and nearly-invariant subspaces. Journal of Operator Theory, 75 (1). pp. 75-90. ISSN 0379-4024
Abstract
A systematic analysis of the structure of finite-dimensional nearly-invariant subspaces of the Hardy space on the half-plane of index p (with 1 < p < 1) is made, and a criterion given by which they may be recognised. As a consequence, a new approach to Hitt's theorem on nearly-invariant subspaces is developed. Moreover, an analogue is given of Hayashi's theorem for finite-dimensional Toeplitz kernels; this is used to establish a necessary and suffcient condition for a Toeplitz kernel to be non-trivial and of dimension n, in terms of a factorisation of its symbol, analogous to Nakazi's work for the disc.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Keywords: | Toeplitz operator; Toeplitz kernel; nearly-invariant subspace; model space; inner-outer factorization; Riemann-Hilbert problem |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mathematics (Leeds) > Pure Mathematics (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 09 Sep 2015 13:25 |
Last Modified: | 03 Nov 2016 06:38 |
Published Version: | http://www.theta.ro/jot/archive/2016-075-001/2016-... |
Status: | Published |
Publisher: | The Theta Foundation |
Identification Number: | 10.7900/jot.2014oct29.2067 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:89639 |