ON JOINT CONVEXITY AND CONCAVITY OF SOME KNOWN TRACE FUNCTIONS

被引：0
|
作者：
Ghaemi, Mohammad Bagher [1 ]
Gharakhanlu, Nahid [1 ]
Cho, Yoel Je [2 ,3 ,4 ]
机构：
[1] Iran Univ Sci & Technol, Sch Math, Tehran 1684613114, Iran
[2] Gyeongsang Natl Univ, Dept Math Educ, Chinju 660701, South Korea
[3] Gyeongsang Natl Univ, RINS, Chinju 660701, South Korea
[4] King Abdulaziz Univ, Dept Math, Jeddah 21589, Saudi Arabia
来源：
MATHEMATICAL REPORTS | 2017年 / 19卷 / 01期
基金：
新加坡国家研究基金会;
关键词：
trace functions; operator monotone functions; jointconvexity; joint concavity; perspective functions; THEOREM;
D O I：
暂无
中图分类号：
O1 [数学];
学科分类号：
0701 ; 070101 ;
摘要：
In this paper, we provide a new and simple proof for joint convexity and concavity of some known trace functions due to Bekjan. Indeed, we will do this by making use of the operator monotone functions and perspective of convex function.
引用
收藏
页码：69 / 74
页数：6
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