Search results for "Spectral mapping"

showing 2 items of 2 documents

A spectral mapping theorem for perturbed strongly continuous semigroups

1991

AlgebraLinear mapSpectral mappingSemigroupGeneral MathematicsBanach spaceGroup theoryTopology (chemistry)MathematicsMathematische Annalen
researchProduct

Some spectral mapping theorems through local spectral theory

2004

The spectral mapping theorems for Browder spectrum and for semi-Browder spectra have been proved by several authors [14], [29] and [33], by using different methods. We shall employ a local spectral argument to establish these spectral mapping theorems, as well as, the spectral mapping theorem relative to some other classical spectra. We also prove that ifT orT* has the single-valued extension property some of the more important spectra originating from Fredholm theory coincide. This result is extended, always in the caseT orT* has the single valued extension property, tof(T), wheref is an analytic function defined on an open disc containing the spectrum ofT. In the last part we improve a re…

Pure mathematicsSpectral theoryTransform theoryGeneral MathematicsSpectrum (functional analysis)Mathematical analysisExtension (predicate logic)Single valued extension property Weyl and semi-Browder operators spectral mapping theorems Weyl’s theoremFredholm theorySpectral linesymbols.namesakesymbolsSpectral theory of ordinary differential equationsAnalytic functionMathematicsRendiconti del Circolo Matematico di Palermo
researchProduct