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Proving the inequality involving Hausdorff distance and Wasserstein infinity distance

Call $A,B$ the two supports, and $h$ the Hausdorff distance. Given a transport plan $\gamma$ we need to infer $h(A,B)\leq\sup^\gamma d(x,y)$, that is, for any $x\in A$, that $\inf_{y\in B} d(x,y)\leq …
Lorenzo Cecchi's user avatar