4 papers
Some refinements of numerical radius inequalities
Zahra Heydarbeygi, Maryam Amyari, Mahnaz Khanehgir
In this paper, we give some refinements for the second inequality in , where . In particular, if is hyponormal by refining the…
Revisiting the Grüss Inequality
H. R. Moradi, S. Furuichi, Z. Heydarbeygi +1
In this article, we explore the celebrated Grüss inequality, where we present a new approach using the Grüss inequality to obtain new refinements of operator means inequalities. We…
Subadditive inequalities for operators
Hamid Reza Moradi, Zahra Heydarbeygi, Mohammad Sababheh
In this article, we present a new subadditivity behavior of convex and concave functions, when applied to Hilbert space operators. For example, under suitable assumptions on the sp…
New inequalities for the generalized Karcher mean
Mohammed Sababheh, Hamid Reza Moradi, Zahra Heydarbeygi
Recently, Pálfia introduced a generalized Karcher mean as a solution of an operator equation. In this article, we present several relations for this new mean. In particular, we inv…