Communications in Information and Systems

Volume 3 (2003)

Number 1

On the tightness of the Zhang-Yeung inequality for Gaussian vectors

Pages: 41 – 46



Radim Lněnička (Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic)


The Zhang-Yeung unconditional inequality for Shannon entropies of discrete random variables can be extended to Gaussian variables. A necessary and sufficient condition for equality in the resulting inequality is presented.


entropy, inequality, information measure, mutual information

2010 Mathematics Subject Classification

Primary 94A17. Secondary 15A15.

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