English

Generic Initial Ideals of Artinian Ideals Having Lefschetz Properties or The Strong Stanley Property

Commutative Algebra 2007-05-23 v1

Abstract

For a standard Artinian kk-algebra A=R/IA=R/I, we give equivalent conditions for AA to have the weak (or strong) Lefschetz property or the strong Stanley property in terms of the minimal system of generators of the generic initial ideal gin(I)\mathrm{gin}(I) of II under the reverse lexicographic order. Using the equivalent condition for the weak Lefschetz property, we show that some graded Betti numbers of gin(I)\mathrm{gin}(I) are determined just by the the Hilbert function of II if AA has the weak Lefschetz property. Furthermore, for the case that AA is a standard Artinian kk-algebra of codimension 3, we show that every graded Betti numbers of gin(I)\mathrm{gin}(I) are determined by the graded Betti numbers of II if AA has the weak Lefschetz property. And if AA has the strong Lefschetz (resp. Stanley) property, then we show that the minimal system of generators of gin(I)\mathrm{gin}(I) is determined by the graded Betti numbers (resp. by the Hilbert function) of II.

Keywords

Cite

@article{arxiv.math/0610733,
  title  = {Generic Initial Ideals of Artinian Ideals Having Lefschetz Properties or The Strong Stanley Property},
  author = {Jea Man Ahn and Young Hyun Cho and Jung Pil Park},
  journal= {arXiv preprint arXiv:math/0610733},
  year   = {2007}
}