intersection of ideals

Use intersect to compute the intersection of two or more ideals.

i1 : R = QQ[a..d];

i2 : intersect(ideal(a,b),ideal(c*d,a*b),ideal(b*d,a*c))

o2 = ideal (b*c*d, a*c*d, a*b*d, a*b*c)

o2 : Ideal of R