New upper bounds for the numerical radius of Hilbert space operators

被引：52
|
作者：
Bhunia, Pintu [1 ]
Paul, Kallol [1 ]
机构：
[1] Jadavpur Univ, Dept Math, Kolkata 700032, W Bengal, India
来源：
BULLETIN DES SCIENCES MATHEMATIQUES | 2021年 / 167卷
关键词：
Numerical radius; Hilbert space; Bounded linear operator; Inequality;
D O I：
10.1016/j.bulsci.2021.102959
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 for the numerical radius of bounded linear operators defined on a complex Hilbert space. Further we obtain estimations for upper bounds for the numerical radius of the sum of the product of bounded linear operators. We show that the bounds obtained here improve on the existing well-known upper bounds. (C) 2021 Elsevier Masson SAS. All rights reserved.
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页数：11
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