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 ...

A sufficient condition is given for the sum A + B of two linear m-accretive operators A and B in a Hilbert space to be m-accretive. This condition is expressed in terms of Re (Au, Bu) for u in D, ...

The Monthly publishes articles, as well as notes and other features, about mathematics and the profession. Its readers span a broad spectrum of mathematical interests, and include professional ...