This book provides an in depth discussion of Loewner’s theorem on the characterization of matrix monotone functions. The author refers to the book as a ‘lov

A Pick function is a function that is analytic in the upper half-plane with positive imaginary part. In the first part of this book we try to give a readable ac

A good part of matrix theory is functional analytic in spirit. This statement can be turned around. There are many problems in operator theory, where most of th