i1 : Q = quadricSurface(ZZ/101[x,y,z,w]);
i2 : C = divisor({1,0},Q);
i3 : D = divisor({0,1},Q);
i4 : C-D o4 = {1, -1} o4 : Divisor
The source of this document is in /build/reproducible-path/macaulay2-1.25.05+ds/M2/Macaulay2/packages/SpaceCurves.m2:1095:0.