On the Zariski-Lipman conjecture for normal algebraic surfaces
arXiv:1403.5613
Abstract
We consider the Zariski-Lipman Conjecture on free module of derivations for algebraic surfaces. Using the theory of non-complete algebraic surfaces, and some basic results about ruled surfaces, we will prove the conjecture for several classes of affine and projective surfaces.
Final version; to appear in Jour. London Math. Soc