Polyhedral results for the Equitable Coloring Problem
  In this work we study the polytope associated with a 0/1 integer programming formulation for the Equitable Coloring Problem. We find several families of valid inequalities and derive sufficient conditions in order to be facet-defining inequalities. We also present computational evidence of the effectiveness of including these inequalities as cuts in a Branch & Cut algorithm. 
Isabel M\'endez-D\'iaz, Graciela Nasini, Daniel Severin
cs.DM