Journées EDP Auvergne-Rhône-Alpes 2022

Stability in optimal transport and strong c-concavity

18 nov. 2022, 11:30

45m

Université Claude Bernard Lyon I, campus de la Doua.

Orateur

Boris Thibert

Description

The stability of optimal transport maps under variation of the measures is fundamental from a mathematical viewpoint and is for instance closely related to the convergence of numerical approaches to solve optimal transport problems.

In this talk, I will first introduce the notion of strong $c$-concavity and show that it plays an important role for proving stability results in optimal transport for general cost functions $c$. I will then introduce a differential criterion for proving that a function is strongly $c$-concave, under the assumption that the cost $c$ satisfies the classical Ma-Trudinger-Wang condition that appears in the regularity theory of optimal transport. I will finally show applications to the reflector problem and the Gaussian curvature measure prescription problem. This a joint work with Anatole Gallouet and Quentin Mérigot.