Optimal Transport from Lebesgue to Poisson

Details Optimal Transport from Lebesgue to Poisson Optimal Transport from Lebesgue to Poisson

2010-12-17

arxiv.org/abs/1012.3845v1

Mathematics

Probability

38 pages, 4 figures

Scientific paper

This paper is devoted to the study of couplings of the Lebesgue measure and the Poisson point process. We prove existence and uniqueness of an optimal (i.e. 'asymptotically optimal' and 'translation invariant') coupling whenever the asymptotic mean transportation cost is finite. Moreover, we give precise conditions for the latter which demonstrate a sharp threshold at $d=2$. The cost will be defined in terms of an arbitrary increasing function of the distance. The coupling will be realized by means of a transport map ('allocation map') which assigns to each Poisson point a set ('cell') of Lebesgue measure 1. In the case of quadratic costs, all these cells will be convex polyhedra.

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