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RESEARCH PRODUCT
On essential spectra of operator-matrices and their Feshbach maps
Joseph P. Lutgensubject
Theoretical physicsApplied MathematicsEssential spectrumDiagonal matrixMathematical analysisSpectrum (functional analysis)Banach spaceOperator theoryTransfer functionAnalysisSpectral lineConnection (mathematics)Mathematicsdescription
Abstract A connection between the essential spectrum of certain operator-matrices and essential spectra of the corresponding “Feshbach maps” is discussed and applied to some concrete rational operator-valued functions.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-01-01 | Journal of Mathematical Analysis and Applications |