Abstract

Let R and B be two sets of distinct points such that the points of R are coloured red and the points of B are coloured blue. Let G be a family of planar graphs such that for each graph in the family |R| vertices are red and |B| vertices are blue. The set R∪B is a universal point set for G if every graph G∈G has a straight-line planar drawing such that the blue vertices of G are mapped to the points of B and the red vertices of G are mapped to the points of R. In this paper we describe universal point sets for meaningful classes of 2-coloured trees and show applications of these results to the coloured simultaneous geometric embeddability problem.

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