A family of functional inequalities: lojasiewicz inequalities and displacement convex functions

Adrien Blanchet and Jérôme Bolte

No 17-66, IAST Working Papers from Institute for Advanced Study in Toulouse (IAST)

Abstract: For displacement convex functionals in the probability space equipped with the Monge-Kantorovich metric we prove the equivalence between the gradient and functional type Lojasiewicz inequalities. In a second part, we specialise these inequalities to some classical geodesically convex functionals. For the Boltzmann entropy, we obtain the equivalence between logarithmic Sobolev and Talagrand's inequalities. On the other hand, the non-linear entropy and the Gagliardo-Nirenberg inequality provide a Talagrand inequality which seems to be a new equivalence. Our method allows also to recover some results on the asymptotic behaviour of the associated gradient flows.

Date: 2017-03
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Working Paper: A family of functional inequalities: lojasiewicz inequalities and displacement convex functions (2017)
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