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

被引：0
作者：
Yang, Chaojun [1 ]
机构：
[1] Changzhou Univ, Dept Math, Changzhou 213164, Peoples R China
来源：
JOURNAL OF MATHEMATICAL INEQUALITIES | 2025年 / 19卷 / 01期
关键词：
Numerical radius; operator norm; operator matrices; function; BOUNDS;
D O I：
10.7153/jmi-2025-19-16
中图分类号：
O29 [应用数学];
学科分类号：
070104 ;
摘要：
In this paper, we present new upper bounds of numerical radius inequalities for 2x 2 operator matrices based on some quantities inequalities, which generalize and refine some known results in the literature.
引用
收藏
页码：247 / 259
页数：13
相关论文
共 17 条
  • [1] UPPER AND LOWER BOUNDS FOR THE NUMERICAL RADIUS WITH AN APPLICATION TO INVOLUTION OPERATORS
    Abu-Omar, Amer
    Kittaneh, Fuad
    [J]. ROCKY MOUNTAIN JOURNAL OF MATHEMATICS, 2015, 45 (04) : 1055 - 1065
  • [2] Further norm and numerical radius inequalities for sum of Hilbert space operators
    Afraz, Davood
    Lashkaripour, Ramatollah
    Bakherad, Mojtaba
    [J]. FILOMAT, 2024, 38 (09) : 3235 - 3242
  • [3] FURTHER NUMERICAL RADIUS INEQUALITIES
    Alomari, Mohammad W.
    Sahoo, Satyajit
    Bakherad, Mojtaba
    [J]. JOURNAL OF MATHEMATICAL INEQUALITIES, 2022, 16 (01): : 307 - 308
  • [4] UPPER BOUNDS FOR NUMERICAL RADIUS INEQUALITIES INVOLVING OFF-DIAGONAL OPERATOR MATRICES
    Bakherad, Mojtaba
    Shebrawi, Khalid
    [J]. ANNALS OF FUNCTIONAL ANALYSIS, 2018, 9 (03): : 297 - 309
  • [5] Bakherad M, 2019, COMPLEX ANAL OPER TH, V13, P1557, DOI 10.1007/s11785-017-0726-9
  • [6] Bhatia R, 2007, PRINC SER APPL MATH, P1
  • [7] BHUNIA P., 2022, Lectures on Numerical Radius Inequalities, Infosys Science Foundation Series in Mathematical Sciences
  • [8] Bottazzi T, 2023, Arxiv, DOI arXiv:2204.14233
  • [9] Some inequalities for the Euclidean operator radius of two operators in Hilbert spaces
    Dragomir, Sever S.
    [J]. LINEAR ALGEBRA AND ITS APPLICATIONS, 2006, 419 (01) : 256 - 264
  • [10] SOME GENERALIZATIONS OF NUMERICAL RADIUS ON OFF-DIAGONAL PART OF 2 x 2 OPERATOR MATRICES
    Hajmohamadi, Monire
    Lashkaripour, Rahmatollah
    Bakherad, Mojtaba
    [J]. JOURNAL OF MATHEMATICAL INEQUALITIES, 2018, 12 (02): : 447 - 457
12