Linear programming formulation of the vertex colouring problem
by Moustapha Diaby
International Journal of Mathematics in Operational Research (IJMOR), Vol. 2, No. 3, 2010

Abstract: In this paper, we present a first linear programming (LP) formulation of the vertex colouring problem (VCP). The complexity orders of the number of variables and the number of constraints of the proposed LP are O (δ⁹·ς³) and O (δ⁸·ς³), respectively, where δ and ς are the number of vertices and the number of available colours in the VCP instance, respectively. Hence, the proposed model represents a reaffirmation of 'P = NP'. First, we develop a bipartite network flow (BNF) based model of the problem. Then, we use a graph-based modelling framework similar to that of Diaby to develop the proposed LP model. A numerical example is used to illustrate the approach.

Online publication date: Sat, 17-Apr-2010

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