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parabolic(RootSystem,Set) -- construct a parabolic from a set of simple roots

Description

i1 : parabolic(rootSystemA(5),set{1,2})

o1 = set {1, 2}

o1 : Parabolic

Ways to use this method:


The source of this document is in /build/reproducible-path/macaulay2-1.25.05+ds/M2/Macaulay2/packages/WeylGroups.m2:3358:0.