ILP Formulations for the RWA Problem - Symmetric Systems Brigitte Jaumard * Christophe Meyer † Babacar Thiongane ‡ October 20, 2004 * B. Jaumard is a Professor in the Department of Computer Science and Operations Research at the Universit´ e de Montr´ eal where she holds a Canada Research Chair on the Optimization of Communication Networks, Canada. Phone: (514) 343-7478. Fax: (514) 343-5834. Email: jaumard@iro.umontreal.ca. † C. Meyer is a researcher in the ORC Research Laboratory of the Department of Computer Science and Operations Research, Universit´ e de Montr´ eal. Email: christop@crt.umontreal.ca. ‡ B. Thiongane is a Postdoctoral Fellow in the ORC Research Laboratory of the De- partement of Computer Science and Operations Research, Universit´ e de Montr´ eal. Email: babacar.thiongane@gerad.ca.