kalmar/GroupRings.jl
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embedding constructor of GroupRing produces sparse GroupRingElem

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kalmarek 2018-08-15 19:28:14 +02:00
parent d5e390bce3
commit 2c7d968990
1 changed files with 9 additions and 10 deletions
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19
src/GroupRings.jl
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@ -151,6 +151,15 @@ function (RG::GroupRing{Gr,T})(V::Vector{T}, S::Type=Int) where {Gr<:Group, T<:G
return res
end
function (RG::GroupRing)(f::Function, X::GroupRingElem{T}) where T
isdefined(RG, :basis) || throw("Can not coerce without basis of GroupRing")
res = RG(T)
for g in supp(X)
res[f(g)] = X[g]
end
return res
end
# keep storage type
function (RG::GroupRing)(x::AbstractVector{T}) where T<:Number
@ -163,16 +172,6 @@ function (RG::GroupRing)(X::GroupRingElem)
return RG(X.coeffs)
end
function (RG::GroupRing)(f::Function, X::GroupRingElem)
isdefined(RG, :basis) || throw("Can not coerce without basis of GroupRing")
res = RG(zeros(X.coeffs))
for g in RG.basis
res[f(g)] = X[g]
end
return res
end
###############################################################################
#
# Basic manipulation && Array protocol