This monograph is devoted to the study of spear operators, that is, bounded linear operators G between Banach spaces X and Y satisfying that for every other bou

This book concerns matrix and operator equations that are widely applied in various disciplines of science to formulate challenging problems and solve them in a

The first systematic account of the basic theory of normed algebras, without assuming associativity. Sure to become a central resource.

This first systematic account of the basic theory of normed algebras, without assuming associativity, includes many new and unpublished results and is sure to b