Calculus of Variations and Geometric Measure Theory
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G. De Philippis - A. R. Mészáros - F. Santambrogio - B. Velichkov

BV Estimates in Optimal Transportation and Applications

created by santambro on 31 Oct 2014
modified on 18 Jan 2018

[BibTeX]

Accepted Paper

Inserted: 31 oct 2014
Last Updated: 18 jan 2018

Journal: Arch. Ration. Mech. An.
Year: 2015

ArXiv: 1503.06389 PDF

Abstract:

In this paper we study the BV regularity for solutions of variational problems in Optimal Transportation. As an application we recover BV estimates for solutions of some non-linear parabolic PDE by means of optimal transportation techniques. We also prove that the Wasserstein projection of a measure with BV density on the set of measures with density bounded by a given BV function f is of bounded variation as well. In particular, in the case f = 1 (projection onto a set of densities with an L\infty bound) we precisely prove that the total variation of the projection does not exceed the total variation of the projected measure. This is an estimate which can be iterated, and is therefore very useful in some evolutionary PDEs (crowd motion,. . .). We also establish some properties of the Wasserstein projection which are interesting in their own, and allow for instance to prove uniqueness of such a projection in a very general framework.


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