The function HIntersectionList applies the function HIntersection
to the elements of a list, i.e., HIntersectionList([I_1,...,I_n]) is
the same as HIntersection(I_1,...,I_n).
The coefficient ring must be a field.
Example
L := [Ideal(x-z,y-2z), Ideal(x-2z,y-z)];
HIntersectionList(L);
Ideal(x + y - 3z, y^2 - 3yz + 2z^2)
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