Petri Net Supervisors for Disjunctive Constraints Marian V. Iordache School of Engineering and Eng. Tech. LeTourneau University Longview, TX 75607-7001 Panos J. Antsaklis Department of Electrical Engineering University of Notre Dame Notre Dame, IN 46556 July 13, 2007 PN Supervisors for Disjunctive Constraints M.V. Iordache and P.J. Antsaklis