kalmar/Groups.jl
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make WreathProduct{Elem} concrete & immutable

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parametrize by WreathProduct{Elem} by T<:Group{Elem}
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kalmar 2017-07-21 13:33:40 +02:00
parent 125e4a5263
commit fa996d68fb
1 changed files with 9 additions and 10 deletions
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19
src/WreathProducts.jl
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@ -18,24 +18,23 @@ doc"""
* `::Group` : the single factor of group N * `::Group` : the single factor of group N
* `::PermutationGroup` : full PermutationGroup * `::PermutationGroup` : full PermutationGroup
""" """
immutable WreathProduct{T<:Group} <: Group
N::DirectProductGroup{T}
P::PermGroup
type WreathProduct <: Group function WreathProduct(G::Group, P::PermGroup)
N::DirectProductGroup N = DirectProductGroup(G, P.n)
P::PermutationGroup
function WreathProduct(G::Group, P::PermutationGroup)
N = DirectProductGroup(typeof(G)[G for _ in 1:P.n])
return new(N, P) return new(N, P)
end end
end end
type WreathProductElem <: GroupElem immutable WreathProductElem{T<:GroupElem} <: GroupElem
n::DirectProductGroupElem n::DirectProductGroupElem{T}
p::perm p::perm
parent::WreathProduct # parent::WreathProduct
function WreathProductElem(n::DirectProductGroupElem, p::perm) function WreathProductElem(n::DirectProductGroupElem, p::perm)
length(n.elts) == parent(p).n length(n.elts) == parent(p).n || throw("Can't form WreathProductElem: lengths differ")
return new(n, p) return new(n, p)
end end
end end