kalmar/GroupRings.jl
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throw if idices of X or Y go beyond size(pm)

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kalmar 2017-07-24 17:27:49 +02:00
parent de72253e90
commit c21f9e043b
1 changed files with 4 additions and 0 deletions
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src/GroupRings.jl
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@ -375,10 +375,14 @@ function mul!{T}(result::GroupRingElem{T}, X::GroupRingElem, Y::GroupRingElem)
RG = parent(X)
s = size(RG.pm)
for j::Int in eachindex(Y.coeffs)
if Y.coeffs[j] != z
j <= s[2] || throw("Element in Y outside of support of RG.pm")
for i::Int in eachindex(X.coeffs)
if X.coeffs[i] != z
i <= s[1] || throw("Element in X outside of support of RG.pm")
if RG.pm[i,j] == 0
g::elem_type(parent(X).group) = RG.basis[i]*RG.basis[j]
RG.pm[i,j] = RG.basis_dict[g]