周環
where formula_117 is the class of a hyperplane (the zero locus of a single linear function). Furthermore, any subvariety formula_91 of degree formula_60 and codimension formula_120 in projective space is rationally equivalent to formula_121. It follows that for any two subvarieties formula_91 and formula_23 of complementary dimension in formula_114 and degrees formula_120, formula_126, respectively, their product in the Chow ring is simply