Phi-entropy inequalities for diffusion semigroups

By Franccois Bolley, Ivan Gentil. 2008

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We obtain and study new $\Phi$-entropy inequalities for diffusion semigroups, with Poincare or logarithmic Sobolev inequalities as particular cases. From this study we derive the asymptotic behaviour of a large class of linear Fokker-Plank type equations under simple conditions, widely extending previous results. Nonlinear diffusion equations are also studied by means of these inequalities. The $\Gamma_2$ criterion of D.~Bakry and M. Emery appears as a main tool in the analysis, in local or integral forms.

View Paper: https://www.semanticscholar.org/paper/19fd1d158196fc71aeb03b9df20cf77e8a1e33c7

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