makeProductRing(n)
makeProductRing(kk,n)
Builds the multi-graded coordinate ring of \PP^{n_1}x...x\PP^{n_m}.
i1 : R = makeProductRing(QQ,{3,4}) o1 = R o1 : PolynomialRing
i2 : R = makeProductRing({3,4}) o2 = R o2 : PolynomialRing
i3 : degrees R o3 = {{1, 0}, {1, 0}, {1, 0}, {1, 0}, {0, 1}, {0, 1}, {0, 1}, {0, 1}, {0, 1}} o3 : List
i4 : gens R o4 = {a, b, c, d, e, f, g, h, i} o4 : List
The object makeProductRing is a method function.