A symbolical computation approach to the preprocessing of distributed parameter systems for preparing a numerical solution by a method of lines technique is investigated. A first prototype of a toolbox for the semi-discretization of partial differential equation systems on simple spatial domains...

In this paper certain properties of algorithms used in symbolic manipulation on signal flow graphs are investigated. The rule-based approach and Mason's formula are compared with respect to preservation of minimal rational representation. It is shown by counter example that rule-based method...