What is it about?
A fundamental identity of de Bruiijn in information theory connects the Shannon entropy and the Fisher information. The extension to the relative entropy under some representative dynamics is presented.
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Why is it important?
The time derivative of relative entropies under evolution equations is relevant to convergence to equilibrium states at a long time limit.
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This page is a summary of: de Bruijn-type identity for systems with flux, Zeitschrift für Physik B Condensed Matter and Quanta, August 2013, Springer Science + Business Media,
DOI: 10.1140/epjb/e2013-40634-9.
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