Invariant subspaces and properties of the spectra of plus-operators with a quasifocusing power in a Krein space (Q1060398)
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scientific article; zbMATH DE number 3907197
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Invariant subspaces and properties of the spectra of plus-operators with a quasifocusing power in a Krein space |
scientific article; zbMATH DE number 3907197 |
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Invariant subspaces and properties of the spectra of plus-operators with a quasifocusing power in a Krein space (English)
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1984
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The author studies invariant subspaces and spectral properties of so- called quasi-focusing plus-operators in spaces with indefinite metric [for the terminology see e.g. \textit{Ju. L. Daletskij}/\textit{M. G. Kreijn}: Stability of solutions of differential equations in Banach spaces (1970; Zbl 0233.34001)]. Moreover, he states a necessary and sufficient condition for an operator A to have a focusing iterate \(A^ p\). Examples are also given.
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invariant subspaces and spectral properties of so-called quasi-focusing plus-operators in spaces with indefinite metric
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focusing iterate
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0.92921174
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0.92070705
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0.91117996
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0.9057414
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0.89298594
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