Besov spaces and a trace ideal (Q1307394)
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scientific article; zbMATH DE number 1355008
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Besov spaces and a trace ideal |
scientific article; zbMATH DE number 1355008 |
Statements
Besov spaces and a trace ideal (English)
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31 October 1999
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Let \(\Pi_2\) be the operator ideal of all absolutely 2-summing operators and let \((\Pi_2)_{2,1}^{(a)}\) be the ideal of operators whose sequences of \(\Pi_2\)-approximation numbers belong to the Lorentz sequence space \(\ell_{2,1}\). The author presents two results of the following kind. If a given matrix or kernel function belongs to a certain Besov space, then the operator it generates is in \((\Pi_2)_{2,1}^{(a)}\).
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Besov spaces
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absolutely 2-summing operators
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Lorentz sequence space
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