目次

Introduction Fundamentals Spectra Perturbation of Unbounded Linear Operators by Relative Boundedness Essential Spectra S-Essential Spectra of Closed Linear Operator on a Banach Space S-Essential Spectrum and Measure of Non-Strict-Singularity S-Pseudospectra and Structured S-Pseudospectra Structured Essential Pseudospectra Structured Essential Pseudospectra and Measure of Noncompactness A Characterization of the Essential Pseudospectra Conditional Pseudospectra