i1 : R = QQ[x, y, u, v] / ideal(x * y - u * v) o1 = R o1 : QuotientRing |
i2 : D1 = divisor({1, -2, 3, -4}, {ideal(x, u), ideal(x, v), ideal(y, u), ideal(y, v)}) o2 = 3*Div(y, u) + -4*Div(y, v) + 1*Div(x, u) + -2*Div(x, v) of R o2 : WDiv |
i3 : divisorToIdeal( D1 ) 2 3 3 2 3 2 2 2 2 o3 = ideal (u v , x*u*v , x v , y*u v , y u v) o3 : Ideal of R |