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saturation of ideals
HSaturation(I:IDEAL, J:IDEAL):IDEAL

This functions returns the saturation of I with respect to J: the
ideal of polynomials F such that F*G is in I for all G in
J^d
for some positive integer
d.
It calculates the saturation using a Hilbertdriven algorithm.
It differs from
Saturation
only when the
input is inhomogeneous, in which case,
HSaturation may be faster.
The coefficient ring must be a field.
Use R ::= QQ[x,y];
I := Ideal(x^4x, yx2x);
Saturation(I, Ideal(x));
HSaturation(I, Ideal(x));
