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move type-related functions to one location
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@ -65,8 +65,16 @@ elem_type(::GroupRing) = GroupRingElem
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parent_type(::GroupRingElem) = GroupRing
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parent_type(::Type{GroupRingElem}) = GroupRing
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eltype(X::GroupRingElem) = eltype(X.coeffs)
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parent{T}(g::GroupRingElem{T}) = g.parent
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Base.promote_rule{T<:Number,S<:Number}(::Type{GroupRingElem{T}}, ::Type{GroupRingElem{S}}) = GroupRingElem{promote_type(T,S)}
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function convert{T<:Number}(::Type{T}, X::GroupRingElem)
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return GroupRingElem(convert(AbstractVector{T}, X.coeffs), parent(X))
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end
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###############################################################################
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#
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# GroupRing / GroupRingElem constructors
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@ -77,10 +85,6 @@ function GroupRingElem{T<:Number}(c::AbstractVector{T}, RG::GroupRing)
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return GroupRingElem{T}(c, RG)
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end
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function convert{T<:Number}(::Type{T}, X::GroupRingElem)
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return GroupRingElem(convert(AbstractVector{T}, X.coeffs), parent(X))
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end
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function GroupRing(G::Group, pm::Array{Int,2})
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size(pm,1) == size(pm,2) || throw("pm must be square, got $(size(pm))")
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RG = GroupRing(G, initialise=false)
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