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WeylGroups :: rootCoefficients(RootSystem,Weight)

rootCoefficients(RootSystem,Weight) -- the coefficients at the simple roots

Synopsis

Description

i1 : R=rootSystemE(6)

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

o1 : RootSystem
i2 : rootCoefficients(R,halfSumOfRoots(R))

o2 = |  8 |
     | 11 |
     | 15 |
     | 21 |
     | 15 |
     |  8 |

       6
o2 : QQ