On representations of Fredholm and semi-Fredholm spectra of multi-Toeplitz operators with symbols in \(H^ \infty +C\) (Q1915589)
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scientific article; zbMATH DE number 894219
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | On representations of Fredholm and semi-Fredholm spectra of multi-Toeplitz operators with symbols in \(H^ \infty +C\) |
scientific article; zbMATH DE number 894219 |
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On representations of Fredholm and semi-Fredholm spectra of multi-Toeplitz operators with symbols in \(H^ \infty +C\) (English)
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5 August 1996
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A representation of Fredholm and semi-Fredholm spectra of multi-Toeplitz operators with symbols in \(H^\infty+C\) is given. If \(\varphi_1,\dots, \varphi_n\in H^\infty+C\) \((n\geq 2)\) and if \((T_{\varphi_1},\dots, T_{\varphi_n})\) is Fredholm then \(\text{ind} (T_{\varphi_1}, T_{\varphi_2},\dots, T_{\varphi_n})=0\) in contrast with the case of one operator.
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Fredholm and semi-Fredholm spectra
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multi-Toeplitz operators
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0.7754184603691101
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