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Jari Taskinen and Jani A. Virtanen
Spectral theory of Toeplitz and Hankel operators on the Bergman space A1
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Published: |
August 20, 2008 |
Keywords: |
Toeplitz operators, Hankel operators, compactness, Fredholmness, Bergman space |
Subject: |
47B35, 47A53, 32A36, 32A37 |
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Abstract
The Fredholm properties of Toeplitz operators on the Bergman space
A2 have been well-known for continuous symbols
since the 1970s. We investigate the case p=1 with continuous
symbols under a mild additional condition, namely that of the
logarithmic vanishing mean oscillation in the Bergman metric. Most
differences are related to boundedness properties of Toeplitz
operators acting on Ap that arise when we no longer have 1<p<∞; in
particular bounded Toeplitz operators on A1 were characterized
completely very recently but only for bounded symbols. We also
consider compactness of Hankel operators on A1.
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Acknowledgements
The first author was partially supported by the Väisälä foundation of the Finnish Academy of Science and Letters. The second author was supported by Academy of Finland Project 207048.
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Author information
Department of Mathematics, University of Helsinki, 00014 Helsinki, Finland
jari.taskinen@helsinki.fi
jani.virtanen@helsinki.fi
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