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The spectra of Toeplitz operators with unimodular symbols
Published online by Cambridge University Press: 20 January 2009
Abstract
The spectrum σ(Tφ) of a Toeplitz operator Tφ on the open unit disc D for a unimodular symbol φ is studied and many sufficient conditions for σ(Tφ)⊆∂D or σ(Tφ) = are given. In particular if φ is a unimodular function in H∞ + C, then σ(Tφ)⊆∂D or σ(Tφ) =
- Type
- Research Article
- Information
- Proceedings of the Edinburgh Mathematical Society , Volume 41 , Issue 1 , February 1998 , pp. 133 - 139
- Copyright
- Copyright © Edinburgh Mathematical Society 1998
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