English

On higher Hessians and the Lefschetz properties

Commutative Algebra 2017-04-28 v2 Algebraic Geometry

Abstract

We deal with a generalization of a Theorem of P. Gordan and M. Noether on hypersurfaces with vanishing (first) Hessian. We prove that for any given N3N\geq 3, d3d \geq 3 and 2k<d22\leq k < \frac{d}{2} there are infinitely many irreducible hypersurfaces X=V(f)PNX = V(f)\subset \mathbb{P}^N, of degree deg(f)=d\operatorname{deg}(f)=d, not cones and such that their Hessian determinant of order kk, hessfk\operatorname{hess}^k_f, vanishes identically. The vanishing of higher Hessians is closely related with the Strong (or Weak) Lefschetz property for standard graded Artinian Gorenstein algebra, as pointed out firstly in \cite{Wa1} and later in \cite{MW}. As an application we construct for each pair (N.d)(3,3),(3,4)(N.d) \neq (3,3),(3,4) infinitely many standard graded Artinian Gorenstein algebras AA, of codimension N+14N+1 \geq 4 and with socle degree d3d \geq 3 which do not satisfy the Strong Lefschetz property, failing at an arbitrary step kk with 2k<d22\leq k<\frac{d}{2}. We also prove that for each pair (N,d)(N,d), N3N \geq 3 and d3d \geq 3 except (3,3)(3,3), (3,4)(3,4), (3,6)(3,6) and (4,4)(4,4) there are infinitely many standard graded Artinian Gorenstein algebras of codimension N+1N+1, with socle degree dd, with unimodal Hilbert vectors which do not satisfy the Weak Lefschetz property.

Keywords

Cite

@article{arxiv.1506.06387,
  title  = {On higher Hessians and the Lefschetz properties},
  author = {Rodrigo Gondim},
  journal= {arXiv preprint arXiv:1506.06387},
  year   = {2017}
}

Comments

Comments are welcome!

R2 v1 2026-06-22T09:57:31.103Z