Concavity of certain matrix trace and norm functions [PDF]
Fumio HiaiLieb's concavity/convexity and Epstein's concavity are extended by improving Epstein's method to matrix trace functions in certain general forms, which are further generalized by the majorization method to concavity/convexity of similar functions under symmetric (anti-) norms in place of the trace.View original: http://arxiv.org/abs/1210.7524
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