3 papers
math.FA2023
Singular Value Inequalities related to PPT Blocks
Mohammad Alakhrass
In this article, we introduce several singular value and norm inequalities comparing the main diagonal and the off-diagonal components of a two by two PPT block. Some applications…
math.RA2022
Numerical Radius of Products of Special Matrices
Mohammad Alakhrass
The purpose of this note is to present upper bounds estimations for the numerical radius of a products and Hadamard products of special matrices, including sectorial and accretive-…
math.RA2021
A note on positive partial transpose blocks
Mohammad Alakhrass
In this article, we study the class of PPT blocks. We introduce several inequalities, related to this class, with an emphasis on comparing the main diagonal and the off-diagonal co…