Convex and monotone operator functions
Volume 62 / 1995
Annales Polonici Mathematici 62 (1995), 1-11
DOI: 10.4064/ap-62-1-1-11
Abstract
The purpose of this note is to provide characterizations of operator convexity and give an alternative proof of a two-dimensional analogue of a theorem of Löwner concerning operator monotonicity.
