4 papers
Operator mean inequalities and Kwong functions
Nahid Gharakhanlu, Mohammad Sal Moslehian, Hamed Najafi
In this paper, we study operator mean inequalities for the weighted arithmetic, geometric and harmonic means. We give a slight modification of Audenaert's result to show the relati…
Characterization of some classes of graphs and their products as frame graph
H. Najafi, F. Abdollahi
To each finite frame in an inner product space we associate a simple graph , called {\it frame graph}, with the vectors of the frame as vertices and there i…
Operator maps of Jensen-type
Frank Hansen, Mohammad Sal Moslehian, Hamed Najafi
Let denote the set of self-adjoint operators acting on a Hilbert space with spectra contained in an open interval . A map $Φ\colon\mathb…
Estimates of operator convex and operator monotone functions on bounded intervals
M. Fujii, M. S. Moslehian, H. Najafi +1
Recently the behavior of operator monotone functions on unbounded intervals with respect to the relation of strictly positivity has been investigated. In this paper we deeply study…