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Polynomially compact-like strongly continuous semigroups - MaRDI portal

Polynomially compact-like strongly continuous semigroups (Q1876562)

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scientific article; zbMATH DE number 2093672
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Polynomially compact-like strongly continuous semigroups
scientific article; zbMATH DE number 2093672

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    Polynomially compact-like strongly continuous semigroups (English)
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    20 August 2004
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    Several results concerning the class of semigroups of operators \((T(t))_{t\geq 0}\) on a Banach space \(X\) such that \(T(s) - I\) is compact for some \(s>0\) are known. The authors study semigroups for which there exists a (nontrivial) polynomial \(p\) such that, for some \(s>0\), \(p(T(s))\) belongs to a two-sided ideal of the algebra \(B(X)\) contained in the set of Fredholm perturbations.
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    \(C_0\)-semigroups
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    Fredholm operators
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    semi-Fredholm operators
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    ideals of operators
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    Fredholm perturbations
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