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complete_reduction for reduce #682

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Jul 25, 2023
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complete_reduction for reduce #682

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16 changes: 12 additions & 4 deletions src/ideal/ideal.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -689,10 +689,14 @@ left reduction, and hence cannot be used to test containment in a two-sided idea
For LETTERPLACE rings (S <: slpalg, FreeAlgebra), the reduction is two-sided as
only two-sided ideals can be constructed here.
"""
function reduce(I::sideal{S}, G::sideal{S}) where S <: SPolyUnion
function reduce(I::sideal{S}, G::sideal{S};complete_reduction::Bool = true) where S <: SPolyUnion
check_parent(I, G)
R = base_ring(I)
ptr = GC.@preserve I G R libSingular.p_Reduce(I.ptr, G.ptr, R.ptr)
if complete_reduction
ptr = GC.@preserve I G R libSingular.p_Reduce(I.ptr, G.ptr, R.ptr)
else
ptr = GC.@preserve I G R libSingular.p_Reduce(I.ptr, G.ptr, R.ptr,1)
end
return sideal{S}(R, ptr, false, I.isTwoSided)
end

Expand All @@ -706,10 +710,14 @@ left reduction, and hence cannot be used to test membership in a two-sided ideal
For LETTERPLACE rings (S <: slpalg, FreeAlgebra), the reduction is the full
two-sided reduction as only two-sided ideals can be constructed here.
"""
function reduce(p::S, G::sideal{S}) where S <: SPolyUnion
function reduce(p::S, G::sideal{S};complete_reduction = true) where S <: SPolyUnion
R = parent(p)
R == base_ring(G) || error("Incompatible base rings")
ptr = GC.@preserve p G R libSingular.p_Reduce(p.ptr, G.ptr, R.ptr)
if complete_reduction
ptr = GC.@preserve p G R libSingular.p_Reduce(p.ptr, G.ptr, R.ptr)
else
ptr = GC.@preserve p G R libSingular.p_Reduce(p.ptr, G.ptr, R.ptr,1)
end
return R(ptr)
end

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