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add dim function for Characters

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kalmarek 2017-11-16 20:01:12 +01:00
parent 39bef16aa7
commit 0d20df8207
1 changed files with 5 additions and 0 deletions
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src/Projections.jl
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@ -22,6 +22,11 @@ end
Nemo.isone(p::GroupElem) = p == parent(p)()
function Nemo.dim(χ::PropertyT.PermCharacter)
G = PermutationGroup(sum(χ.p))
return χ(G())
end
## NOTE: this works only for Z/2!!!!
function (chi::DirectProdCharacter)(g::DirectProductGroupElem)
return reduce(*, 1, ((-1)^isone(g.elts[j]) for j in 1:chi.i))