%0 Journal Article
%T Characterisation of matrix entropies
%A Frank Hansen
%A Zhihua Zhang
%J Physics
%D 2014
%I arXiv
%R 10.1007/s11005-015-0784-8
%X The notion of matrix entropy was introduced by Tropp and Chen with the aim of measuring the fluctuations of random matrices. It is a certain entropy functional constructed from a representing function with prescribed properties, and Tropp and Chen gave some examples. We give several abstract characterisations of matrix entropies together with a sufficient condition in terms of the second derivative of their representing function.
%U http://arxiv.org/abs/1402.2118v3