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Augmenting a Geometric Matching is $NP$-complete (1206.6360v1)
Published 27 Jun 2012 in cs.CC and cs.CG
Abstract: Given $2n$ points in the plane, it is well-known that there always exists a perfect straight-line non-crossing matching. We show that it is $NP$-complete to decide if a partial matching can be augmented to a perfect one, via a reduction from 1-in-3-SAT. This result also holds for bichromatic matchings.