dynkinDiagram -- produce a Dynkin Diagram

Ways to use dynkinDiagram :

• dynkinDiagram(DynkinDiagram,Parabolic) -- the Dynkin diagram of the Levy subgroup of a parabolic
• dynkinDiagram(RootSystem) -- the Dynkin diagram of a root system

For the programmer

The object dynkinDiagram is a method function.