Non-crossing matchings of points with geometric objects
Computational Geometry: Theory and Applications
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Given a class $\mathcal{C}$of geometric objects and a point set P, a $\mathcal{C}$-matching of P is a set $M=\{C_{1},\dots,C_{k}\}\subseteq \mathcal{C}$of elements of $\mathcal{C}$such that each C i contains exactly two elements of P and each element of P lies in at most one C i . If all of the elements of P belong to some C i , M is called a perfect matching. If, in addition, all of the elements of M are pairwise disjoint, we say that this matching M is strong. In this paper we study the existence and characteristics of $\mathcal{C}$-matchings for point sets in the plane when $\mathcal{C}$is the set of isothetic squares in the plane. A consequence of our results is a proof that the Delaunay triangulations for the L ∞ metric and the L 1 metric always admit a Hamiltonian path.