Quasihomogeneity of curves and the Jacobian endomorphism ring
  We give a quasihomogeneity criterion for Gorenstein curves. For complete intersections, it is related to the first step of Vasconcelos' normalization algorithm. In the process, we give a simplified proof of the Kunz-Ruppert criterion. 
Michel Granger, Mathias Schulze
math.AG math.AC