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WeylGroups :: weight(RootSystem,BasicList)

weight(RootSystem,BasicList) -- construct a weight from a list

Synopsis

Description

i1 : R=rootSystemB(3)

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

o1 : RootSystem
i2 : weight(R,{1,2,1})

o2 = | 1 |
     | 2 |
     | 1 |

o2 : Weight