Linear operators form the cornerstone of analysis in Banach spaces, offering a framework in which one can rigorously study continuity, spectral properties and stability. Banach space theory, with its ...

Let T be a bounded linear operator on a Hilbert space and assume T has thin spectrum. When is T similar to a normal operator? This problem is studied in a variety of situations and sufficient ...

Every student of numerical linear algebra is familiar with block matrices and vectors. The same ideas can be applied to the continuous analogues of operators, functions, and functionals. It is shown ...