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Macaulay2 website
WeylGroups
::
halfSumOfRoots(RootSystem)
halfSumOfRoots(RootSystem) -- the half-sum of positive roots
Synopsis
Function:
halfSumOfRoots
Usage:
halfSumOfRoots(R)
Inputs:
R
,
an instance of the type
RootSystem
Outputs:
an instance of the type
Weight
, the half-sum of positive roots in
R
Description
i1 : halfSumOfRoots(rootSystemE(6)) o1 = | 1 | | 1 | | 1 | | 1 | | 1 | | 1 | o1 : Weight