CONCAVE FUNCTIONS OF PARTITIONED MATRICES WITH NUMERICAL RANGES IN A SECTOR

被引：8
|
作者：
Hou, Lei [1 ]
Zhang, Dengpeng [1 ]
机构：
[1] Shanghai Univ, Dept Math, Shanghai 200444, Peoples R China
来源：
MATHEMATICAL INEQUALITIES & APPLICATIONS | 2017年 / 20卷 / 02期
基金：
美国国家科学基金会;
关键词：
Rotfel'd theorem; concave function; numerical range; accretive-dissipative matrix; ACCRETIVE-DISSIPATIVE MATRICES; DETERMINANTAL INEQUALITIES; EIGENVALUE INEQUALITIES; EXTENSION; CONVEX;
D O I：
10.7153/mia-20-40
中图分类号：
O1 [数学];
学科分类号：
0701 ; 070101 ;
摘要：
We prove two inequalities for concave functions and partitioned matrices whose numerical ranges in a sector. These complement some results of Zhang in [Linear Multilinear Algebra 63 (2015) 2511-2517].
引用
收藏
页码：583 / 589
页数：7
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