Positivity, Betweenness, and Strictness of Operator Means

Chansangiam, Pattrawut

doi:10.1155/2015/851568

Positivity, Betweenness, and Strictness of Operator Means

Author(s)

Chansangiam, Pattrawut

Date Issued

January 1, 2015

Type

Article

DOI

10.1155/2015/851568

Abstract

An operator mean is a binary operation assigned to each pair of positive operators satisfying monotonicity, continuity from above, the transformer inequality, and the fixed-point property. It is well known that there are one-to-one correspondences between operator means, operator monotone functions, and Borel measures. In this paper, we provide various characterizations for the concepts of positivity, betweenness, and strictness of operator means in terms of operator inequalities, operator monotone functions, Borel measures, and certain operator equations.

Citation

Abstract and Applied Analysis, 2015, 2015