Abstract
We address the question of how to represent Kantorovich potentials in the mass transportation (or Monge–Kantorovich) problem as a signed distance function from a closed set. We discuss geometric conditions on the supports of the measure f + and f − in the Monge–Kantorovich problem which ensure such a representation. Finally, we obtain, as a by-product, the continuous differentiability of the potential on the transport set.
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