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Article Dans Une Revue Comptes Rendus. Mathématique Année : 2006

Convex Sobolev inequalities and spectral gap

Résumé

This note is devoted to the proof of convex Sobolev (or generalized Poincaré) inequalities which interpolate between spectral gap (or Poincaré) inequalities and logarithmic Sobolev inequalities. We extend to the whole family of convex Sobolev inequalities results which have recently been obtained by Cattiaux and Carlen and Loss for logarithmic Sobolev inequalities. Under local conditions on the density of the measure with respect to a reference measure, we prove that spectral gap inequalities imply all convex Sobolev inequalities with constants which are uniformly bounded in the limit approaching the logarithmic Sobolev inequalities. We recover the case of the logarithmic Sobolev inequalities as a special case.
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Dates et versions

hal-00004418 , version 1 (11-03-2005)

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Jean Dolbeault, Jean-Philippe Bartier. Convex Sobolev inequalities and spectral gap. Comptes Rendus. Mathématique, 2006, 342 (5), pp.307-312. ⟨hal-00004418⟩
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