Equations defining tangent cones of Gorenstein monomial curves
  Let $C$ be a Gorenstein non complete intersection monomial curve in the 4-dimensional affine space. In this paper we study the minimal number of generators of the tangent cone of $C$. Special attention will be paid to the case where $C$ has Cohen-Macaulay tangent cone at the origin. 
Anargyros Katsabekis
math.AC math.AG