English

Restrictions on Hilbert coefficients give depths of graded domains

Commutative Algebra 2025-01-15 v1

Abstract

In this paper, we prove that if PP is a homogeneous prime ideal inside a standard graded polynomial ring SS with dim(S/P)=d\dim(S/P)=d, and for sds \leq d, adjoining ss general linear forms to the prime ideal changes the (ds)(d-s)-th Hilbert coefficient by 1, then depth(S/P)=s1\text{depth}(S/P)=s-1. This criterion also tells us about possible restrictions on the generic initial ideal of a prime ideal inside a polynomial ring.

Keywords

Cite

@article{arxiv.2501.07829,
  title  = {Restrictions on Hilbert coefficients give depths of graded domains},
  author = {Cheng Meng},
  journal= {arXiv preprint arXiv:2501.07829},
  year   = {2025}
}