“…Let denote the saturation of the ideal with respect to the maximal ideal in S and consider the local cohomology group, usually called the Jacobian module of f , The graded S ‐module of all Jacobian relations of f is defined by Its sheafification is a rank two vector bundle on , see for details. More precisely, one has , where is the sheaf of logarithmic vector fields along C as considered for instance in . We set …”