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Matrix inequalities involving a positive linear map

Linear and Multilinear Algebra, 1996
Let A be a Hermitian matrix, let Φ be a normalized positive linear map and let f be a continuous real valued function. Real constants α and β such that are determined. If f is matrix convex then β can be taken to be 1. A unified approach is proposed so that the problem of determining α and β is reduced to solving a single variable convex minimization ...
Chi-Kwong Li, Roy Mathias
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