Dynamical Quantities in Net Systems

The paper presents some known material of higher-level Petri nets in analogy to the dynamics of physical systems. Its aim is to widen the view on the role of the incidence matrix in the analysis of net systems. Rather than focusing on constant state quantities (S-invariants) and cyclic actions (T-invariants), i.e. on solutions of the homogeneous equation systems based on the incidence matrix, it studies dynamical quantities of net systems in general. Received March 2000 / Accepted in revised form March 2002 RID="¹" ID="¹" This work was done while the author was with GMD { National Research Center for Information Technology (now Fraunhofer Gesellschaft). Part of it was funded by Deutsche Forschungsgemeinschaft, Priority Programme Analysis and Synthesis of Continuous–Discrete Engineering Systems (KONDISK), Ref. No. GE 933/1-2. Correspondence and offprint requests to: Hartmann J. Genrich, Peter-Ohlenhardt-Str. 5, D-53127 Bonn, Germany. Email: hartmann.genrich@gmd.deau