On Prekopa-Leindler inequalities on metric-measure spaces

Details On Prekopa-Leindler inequalities on metric-measure spaces On Prekopa-Leindler inequalities on metric-measure spaces

2009-12-18

arxiv.org/abs/0912.3593v1

Mathematics

Metric Geometry

Scientific paper

This work is devoted to the geometric analysis of metric-measure spaces satisfying a Prekopa-Leindler or a more general Borell-Brascamp-Lieb inequality. Completing the early investigations by Cordero-Erausquin, McCann and Schmuckenschlager, we show that these functional inequalities characterize lower bounds on the Ricci curvature on a Riemannian manifold, providing thus an alternate version of Ricci curvature lower bounds in measured length spaces to the recent developments by Lott, Villani and Sturm. We also investigate stability properties and geometric and functional inequalities, such as logarithmic Sobolev inequality and Bishop-Gromov diameter estimate, in measured length spaces satisfying a Prekopa-Leindler or a Borell-Brascamp-Lieb inequality.

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