Maxima Function
poly_ideal_saturation (polylist1, polylist2, varlist)
Returns the reduced Groebner basis of the saturation of the ideal
I(polylist1):I(polylist2)^inf
Geometrically, over an algebraically closed field, this is the set of polynomials in the ideal generated by polylist1 which do not identically vanish on the variety of polylist2.