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ON JOINT CONVEXITY AND CONCAVITY OF SOME KNOWN TRACE FUNCTIONS
Journal article   Peer reviewed

ON JOINT CONVEXITY AND CONCAVITY OF SOME KNOWN TRACE FUNCTIONS

Mohammad Bagher Ghaemi, Nahid Gharakhanlu and Yoel Je Cho
Mathematical Reports (Bucharest), Vol.19(1), pp.69-74
01/01/2017

Abstract

Mathematics Physical Sciences Science & Technology
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.

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