Builds the Chow ring Z[H1,...,Hm]/(H1n1+1,...,Hmnm+1) of ℙn1x...xℙnm.
i1 : R = makeProductRing({3,4}) o1 = R o1 : PolynomialRing
i2 : R = makeChowRing(R) o2 = R o2 : QuotientRing
i3 : describe R ZZ[H , H ] 1 2 o3 = ---------- 4 5 (H , H ) 1 2