P LURALISM IN D ISTRIBUTED P ARAMETER S YSTEMS , University of Twente, The Netherlands, 2–6 July, 2001. Organizers: PROF.RUTH CURTAIN, University of Groningen, P.O. Box 800, 9700 AV Groningen, NL. email: R.F.Curtain@math.rug.nl, fax: +31 50 3633800 DR.HANS ZWART, University of Twente, P.O. Box 217, 7500 AE Enschede, NL. email: H.J.Zwart@math.utwente.nl, fax +31 53 4340733 WWW. MATH. UTWENTE. NL/ SSB/ PDPS