Matchings in metric spaces, the dual problem and calibrations modulo 2
2016
We show that for a metric space with an even number of points there is a 1-Lipschitz map to a tree-like space with the same matching number. This result gives the first basic version of an unoriented Kantorovich duality. The study of the duality gives a version of global calibrations for 1-chains with coefficients in Z2. Finally we extend the results to infinite metric spaces and present a notion of “matching dimension” which arises naturally.
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