dynkinDiagram(RootSystem) -- the Dynkin diagram of a root system

Function: dynkinDiagram
Usage:

dynkinDiagram(R)
Inputs:
- R, an instance of the type RootSystem,
Outputs:
- an instance of the type DynkinDiagram, the Dynkin diagram of the root system R

Description

i1 : R1=rootSystemA(5)

o1 = RootSystem{...8...}

o1 : RootSystem

i2 : dynkinDiagram(R1)

o2 = DynkinDiagram{{{2}, {}, {}, {}, {}}, {{1, 3}, {}, {}, {}, {}}, {{2, 4}, {}, {}, {}, {}}, {{3, 5}, {}, {}, {}, {}}, {{4}, {}, {}, {}, {}}}

o2 : DynkinDiagram

i3 : R2=rootSystemF4

o3 = RootSystem{...8...}

o3 : RootSystem

i4 : dynkinDiagram(R2)

o4 = DynkinDiagram{{{2}, {}, {}, {}, {}}, {{1}, {3}, {}, {}, {}}, {{4}, {}, {2}, {}, {}}, {{3}, {}, {}, {}, {}}}

o4 : DynkinDiagram

Ways to use this method:

dynkinDiagram(RootSystem) -- the Dynkin diagram of a root system

The source of this document is in WeylGroups.m2:3850:0.