Proceedings of the European Workshop on Mixed Integer Nonlinear Programming 12-16 April 2010 - CIRM - Marseille - France Pierre Bonami 1 Leo Liberti 2 Andrew J. Miller 3 Annick Sartenaer 4 1 LIF, Universit´ e de la M´ editerran´ ee, Marseille, France. pierre.bonami@lif.univ-mrs.fr 2 LIX, ´ Ecole Polytechnique, Palaiseau, France. liberti@lix.polytechnique.fr 3 IMB, Universit´ e de Bordeaux 1, France. andrew.miller@math.u-bordeaux1.fr 4 Dept. of Maths, Universit´ e de Namur, Belgium. annick.sartenaer@fundp.ac.be