English

Lefschetz properties of Jacobian algebras and Jacobian modules

Algebraic Geometry 2023-10-20 v3

Abstract

Let V:f=0V:f=0 be a hypersurface of degree d3d \geq 3 in the complex projective space Pn\mathbb{P}^n, n3n \geq 3, having only isolated singularities. Let M(f)M(f) be the associated Jacobian algebra and H:=0H: \ell=0 be a hyperplane in Pn\mathbb{P}^n avoiding the singularities of VV, but such that VHV \cap H is singular. We related the Lefschetz type properties of the linear maps :M(f)kM(f)k+1\ell: M(f)_k \to M(f)_{k+1} induced by the multiplication by linear form \ell to the singularities of the hyperplane section VHV \cap H. Similar results are obtained for the Jacobian module N(f)N(f).

Keywords

Cite

@article{arxiv.2202.02233,
  title  = {Lefschetz properties of Jacobian algebras and Jacobian modules},
  author = {Alexandru Dimca and Giovanna Ilardi},
  journal= {arXiv preprint arXiv:2202.02233},
  year   = {2023}
}

Comments

This new version, where some details are added and some references are updated, is accepted for publication in Annali della Scuola Normale Superiore di Pisa