A JOURNEY WITH THE INTEGRATED Γ2 CRITERION AND ITS WEAK FORMS
Résumé
As the title indicates this paper will describe several extensions and applications of the Γ2 integrated criterion introduced by M. Ledoux following ideas of B. Hellffer. We introduce general weak versions and show that they are equivalent to the weak Poincaré inequalities introduced by M. Röckner and F. Y. Wang. We also discuss special weak versions appropriate to the study of log-concave measures and log-concave perturbations of product measures.
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