v || w
i1 : R = (ZZ[x,y,z])^3;
i2 : v = vector {1,x,x*y,x*z,x*y*z} o2 = | 1 | | x | | xy | | xz | | xyz | 5 o2 : (ZZ[x..z])
i3 : w = vector {z*x,z^2,3} o3 = | xz | | z2 | | 3 | 3 o3 : (ZZ[x..z])
i4 : v || w o4 = | 1 | | x | | xy | | xz | | xyz | | xz | | z2 | | 3 | 8 o4 : (ZZ[x..z])