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Journal of Convex Analysis 25 (2018), No. 1, 135--160
Copyright Heldermann Verlag 2018

Optimal Transportation with Boundary Costs and Summability Estimates on the Transport Density

Samer Dweik
Laboratoire de Mathématiques d'Orsay, Université Paris-Saclay, 91405 Orsay Cedex, France

We analyze a mass transportation problem in a bounded domain with the possibility to transport mass to/from the boundary, paying the transport cost, that is given by the Euclidean distance plus an extra cost depending on the exit/entrance point. This problem appears in import/export model, as well as in some shape optimization problems. We study the Lp summability of the transport density which does not follow from standard theorems, as the target measures are not absolutely continuous but they have some parts which are concentrated on the boundary. We also provide the relevant duality arguments to connect the corresponding Beckmann and Kantorovich problems to a formulation with Kantorovich potentials with Dirichlet boundary conditions.

Keywords: Optimal transport, Monge-Kantorovich equation, transport density.

MSC: 35B65, 46N10, 49N60

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