Was man nicht alles als Kunst verkaufen kann ....

Ein tool für Lombardi, aus Tübingen, leider zu spät ...

https://www.youtube.com/watch?v=OmSTwKw7dX4

Bernd Borchert

http://en.wikipedia.org/wiki/Directed_graph

A directed graph is a pair (V,E) of sets V and E such that V is a finite set and E is a subset of the Cartesian set product V x V.
The elements of V are called "nodes" or "vertices", the elements of E are called "edges".