Heinz均值凸性的一个注记(A note on the convexity of the Heinz means)

Abstract

Recently, KITTANEH obtained an improvement of the Heinz inequality for all unitarily invariant norms. In this note, we obtain a refinement of KITTANEH's result. We shall conclude this paper with some numerical examples.

Keywords

• heinz inequality
• unitarily invariant norms
• positive semidefinite matrices