Exact Algorithms for Intervalizing Coloured Graphs
Hans L. Bodlaender, Johan M. M. van Rooij · Theory of Computing Systems · 2015
In the Intervalizing Coloured Graphs problem, one must decide for a given graph G = (V, E) with a proper vertex colouring of G whether G is the subgraph of a properly coloured interval graph. For the case that the number of colors is fixed, we give an exact algorithm that uses $2^{\mathcal {O}(n/\log n)}$ time. We also give an $\mathcal {O}^{\ast }(2^{n})$ algorithm for the case that the number of colors is not fixed.