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WeylGroups :: halfSumOfRoots(RootSystem)

halfSumOfRoots(RootSystem) -- the half-sum of positive roots

Synopsis

Description

i1 : halfSumOfRoots(rootSystemE(6))

o1 = | 1 |
     | 1 |
     | 1 |
     | 1 |
     | 1 |
     | 1 |

o1 : Weight