SOME REFINEMENTS OF NUMERICAL RADIUS INEQUALITIES FOR 2 x 2 OPERATOR MATRICES

被引：6
作者：
Qiao, Hongwei
Hai, Guojun
Bai, Eburilitu
机构：
[1] School of Mathematical Sciences, Inner Mongolia University, Hohhot
来源：
JOURNAL OF MATHEMATICAL INEQUALITIES | 2022年 / 16卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Numerical radius; inequality; operator norm; operator matrix;
D O I：
10.7153/jmi-2022-16-31
中图分类号：
O29 [应用数学];
学科分类号：
070104 ;
摘要：
In this paper, new numerical radius inequalities for 2 x 2 operator matrices are proved. These numerical radius inequalities refine the existing upper bounds.
引用
收藏
页码：425 / 444
页数：1
相关论文
共 17 条
[1]   Weak majorization inequalities and convex functions [J].
Aujla, JS ;
Silva, FC .
LINEAR ALGEBRA AND ITS APPLICATIONS, 2003, 369 :217-233
[2]   Refined and generalized numerical radius inequalities for 2 x 2 operator matrices [J].
Bani-Domi, Watheq ;
Kittaneh, Fuad .
LINEAR ALGEBRA AND ITS APPLICATIONS, 2021, 624 (624) :364-386
[3]   Norm and numerical radius inequalities for Hilbert space operators [J].
Bani-Domi, Watheq ;
Kittaneh, Fuad .
LINEAR & MULTILINEAR ALGEBRA, 2021, 69 (05) :934-945
[4]   Norm equalities and inequalities for operator matrices [J].
Bani-Domi, Wathiq ;
Kittaneh, Fuad .
LINEAR ALGEBRA AND ITS APPLICATIONS, 2008, 429 (01) :57-67
[5]  
Buzano M.L., 1974, REND SEM MAT U POLIT, V31, P405
[6]  
Dragomir S.S., 2009, SARAJEVO J MATH, V5, P269
[7]  
Dragomir SS., 2007, DEMONSTR MATH, V40, P411
[8]   Numerical radius inequalities for Hilbert space operators. II [J].
El-Haddad, Mohammad ;
Kittaneh, Fuad .
STUDIA MATHEMATICA, 2007, 182 (02) :133-140
[9]   Numerical Radius Inequalities for Certain 2 x 2 Operator Matrices [J].
Hirzallah, Omar ;
Kittaneh, Fuad ;
Shebrawi, Khalid .
INTEGRAL EQUATIONS AND OPERATOR THEORY, 2011, 71 (01) :129-147
[10]   Numerical radius inequalities for Hilbert space operators [J].
Kittaneh, F .
STUDIA MATHEMATICA, 2005, 168 (01) :73-80
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