Abstract
We demonstrate how Epstein's method using theory of Pick func-tions improves the existing results and also proves new ones on the joint con-cavity of trace functions of the form Tr (F(A1, . . . ,Ak)), where F(A1, . . .,Ak)is a matrix-valued function of positive semidefinite matrices A1, . . . ,Ak.
Citation
Fumio Hiai. "CONCAVITY OF CERTAIN MATRIX TRACE FUNCTIONS." Taiwanese J. Math. 5 (3) 535 - 554, 2001. https://doi.org/10.11650/twjm/1500574948
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