Bounds for the Numerical Radii of 2×2 Operator Matrices

In this paper, we give several bounds for the numerical radii of 2 × 2 operator matrices. Some known inequalities are also refined.

Saved in:
Bibliographic Details
Published in:Vietnam journal of mathematics 2025, Vol.53 (1), p.171-181
Main Authors: Frakis, Abdelkader, Kittaneh, Fuad, Soltani, Soumia
Format: Article
Language:English
Subjects:
Mathematics
Mathematics and Statistics
Original Article
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this paper, we give several bounds for the numerical radii of 2 × 2 operator matrices. Some known inequalities are also refined.
ISSN:2305-221X
2305-2228
DOI:10.1007/s10013-023-00638-y