Lefschetz elements of Artinian Gorenstein algebras and Hessians of homogeneous polynomials
arXiv:0903.3581
Abstract
We give a characterization of the Lefschetz elements in Artinian Gorenstein rings over a field of characteristic zero in terms of the higher Hessians. As an application, we give new examples of Artinian Gorenstein rings which do not have the strong Lefschetz property.