kalmar/GroupRings.jl
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rational division for integral group rings

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kalmar 2017-05-18 12:19:41 +02:00
parent 486f2cff9a
commit 148c8e2611
1 changed files with 6 additions and 0 deletions
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src/GroupRings.jl
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@ -233,6 +233,12 @@ end
(/)(X::GroupRingElem, a) = scalar_mult(1/a, X) (/)(X::GroupRingElem, a) = scalar_mult(1/a, X)
function (//){T<:Integer, S<:Integer}(X::GroupRingElem{T}, a::S)
U = typeof(X[1]//a)
warn("Rational division: promoting result to $U")
return convert(U, X)//a
end
(//){T<:Rational, S<:Rational}(X::GroupRingElem{T}, a::S) = (//){T<:Rational, S<:Rational}(X::GroupRingElem{T}, a::S) =
GroupRingElem(X.coeffs//a, parent(X)) GroupRingElem(X.coeffs//a, parent(X))