Hello! I'm trying to get information about Ehresmann & Vanbremeersch theory of "Evolutive systems with memory". This is a theory for modelling complex evolutive systems using category theory. I've got a couple of papers (from 1989 to 1992), but I would like to find a synthtic article which could present the matter more consistently... Does anybody know if there is such a thing, or at least whom I could ask? Thank you for any help, Matthieu Amiguet Université de Neuchatel CH-2000 Neuchatel