Note bezüglich der Zahl der Moduln einer Classe von algebraischen Gleichungen. Von A. Brill in Giessen
We show that the non-proper value set of a polynomial map (P,Q): ℂ² → ℂ² satisfying the Jacobian condition detD(P,Q) ≡ const ≠ 0, if non-empty, must be a plane curve with one point at infinity.