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WeylGroups :: longestWeylGroupElement(RootSystem,Parabolic)

longestWeylGroupElement(RootSystem,Parabolic) -- the longest element of a parabolic subgroup of the Weyl group of a root system

Synopsis

Description

i1 : R=rootSystemF4;
i2 : longestWeylGroupElement(R,parabolic(R,set{1,2}))

o2 = WeylGroupElement{RootSystem{...8...}, | -1 |}
                                           | -1 |
                                           |  5 |
                                           |  1 |

o2 : WeylGroupElement