2014/08/25 by Pattrawut Chansangiam, Chansangiam, Pattrawut
Computer Science · Mathematics · #47A63 #47A64 #Approximation Theory and Sequence Spaces #FOS: Mathematics #Functional Analysis (math.FA) #Mathematical Inequalities and Applications #Matrix Theory and Algorithms
paper · pdf · doi:10.48550/arxiv.1408.5701
openalex publication_date 2014/08/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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.