eval(RootSystem,ZZ,ZZ) -- evaluate the dual of a simple root at another one

Synopsis

• Function: eval

• Usage:

  eval(R,i,j)

• Inputs:
  • R, an instance of the type RootSystem,
  • i, an integer, the number of the first simple root
  • j, an integer, the number of the second simple root
• Outputs:
  • an integer, the dual of the j-th simple root evaluated at the i-th simple root

Description

i1 : R=rootSystemA(2)

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

o1 : RootSystem

i2 : eval(R,1,1)

o2 = 2

i3 : eval(R,1,2)

o3 = -1