Fabrice Kordon is a full-time professor at Université P. & M. Curie (UPMC). Serge Haddad is a full-time professor at école Normale Supérieure de Cachan, a member of the CNRS laboratory LSV, and a member of the INRIA team MExICo. Laurent Pautet is a full-time professor at Télécom ParisTech and a member of the CNRS laboratory LTCI. Laure Petrucci is a full-time professor at University Paris 13 in France and a member of the CNRS laboratory LIPN.