6 papers
A Comparison of some Weighted Numerical Radii of Hilbert Space Operators
Maryam Khosravi, Alemeh Sheikhhosseini
In recent years, several generalizations of the numerical radius for bounded linear operators on Hilbert spaces have been introduced and extensively studied. These generalizations…
Weighted numerical radii of accretive matrices
Alemeh Sheikhhosseini, Maram Khosravi
In this paper, we consider the notion of the weighted numerical radius, denoted by , for the class of accretive matrices, where \\ This notion generalizes…
The Resolvent Mean and The Parametrized
Alemeh Sheikhhosseini, Eman Aldabbas, Mohammad Sababheh
Resolvent average and weighted \(\mathcal{A}\sharp \mathcal{H}\)-mean have been defined recently for positive definite matrices. Since the class of accretive matrices provides a ge…
Some Hadamard product inequalities for accretive matrices
A. Sheikhhosseini, S. Malekinejad, M. Khosravi
In this paper, we obtain some new matrix inequalities involving Hadamard product. Also some Hadamard product inequalities for accretive matrices involving the matrix means, positiv…
On refined operator version of Young inequality and its reverse
Alemeh Sheikhhosseini, Maryam Khosravi
In this note, some refinements of Young inequality and its reverse for positive numbers are proved and using these inequalities some operator versions and Hilbert-Schmidt norm vers…
On improvement of Young inequality using the Kontrovich constant
Maryam Khosravi, Alemeh Sheikhhosseini
Some improvements of Young inequality and its reverse for positive numbers with Kontrovich constant are given. Using these inequalities some operator versions and Hilbert-Schmidt n…