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arxiv: 1408.4049 · v1 · pith:DRSCCA53new · submitted 2014-08-18 · 💻 cs.IT · math.FA· math.IT

A strengthened entropy power inequality for log-concave densities

classification 💻 cs.IT math.FAmath.IT
keywords inequalitycasedensitiesentropylog-concaveshannonstrengthenedadmits
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We show that Shannon's entropy--power inequality admits a strengthened version in the case in which the densities are log-concave. In such a case, in fact, one can extend the Blachman--Stam argument to obtain a sharp inequality for the second derivative of Shannon's entropy functional with respect to the heat semigroup.

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