sponsored by the Department of Electrical Engineering and the Coordinated Science Laboratory of the University of Illinois and the Circuit Theory and Automatic Control Groups of the Institute of Electrical & ELectronics Engineers. edited by A. H. Haddad, G. Metze and T. N. Trick ; sponsored by the Department of Electrical Engineering and the Coordinated Science Laboratory of the University of Illinois Urbana, Illinois and the Circuit Theory and Automatic Control Groups of the Institute of Electrical & Electronics Engineers. sponsored by the Department of Electrical Engineering and the Coordinated Science Laboratory of the University of Illinois at Urbana-Champaign ; conference co-chairmen F. P. Preparata, M. B. Pursley. Sponsored by the Department of Electrical Engineering Purdue University and the Circuit Theory Group of the Institute of Electrical and Electronics Engineers, Inc..