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Macaulay2 website
WeylGroups
::
norm(RootSystem,Root)
norm(RootSystem,Root) -- the squared norm of a root
Synopsis
Function:
norm
Usage:
norm(R,r)
Inputs:
R
,
an instance of the type
RootSystem
r
,
an instance of the type
Root
Outputs:
an
integer
, the squared norm of
r
, short roots being of norm 1
Description
i1 : norm(rootSystemF4,simpleRoot(rootSystemF4,2)) o1 = 2