English

Trimming Five Generated Gorenstein Ideals

Commutative Algebra 2024-04-05 v1

Abstract

Let (R,m,k)(R,\mathfrak{m},\Bbbk) be a regular local ring of dimension 3. Let II be a Gorenstein ideal of RR of grade 3. It follows from a result of Buchsbaum and Eisenbud that there is a skew-symmetric matrix of odd size such that II is generated by the sub-maximal pfaffians of this matrix. Let JJ be the ideal obtained by multiplying some of the pfaffian generators of II by m\mathfrak{m}; we say that JJ is a trimming of II. In a previous work, the first author and A. Hardesty constructed an explicit free resolution of R/JR/J and computed a DG algebra structure on this resolution. They utilized these products to analyze the Tor algebra of such trimmed ideals. Missing from their result was the case where II is five generated. In this paper we address this case.

Keywords

Cite

@article{arxiv.2404.03601,
  title  = {Trimming Five Generated Gorenstein Ideals},
  author = {Luigi Ferraro and W. Frank Moore},
  journal= {arXiv preprint arXiv:2404.03601},
  year   = {2024}
}
R2 v1 2026-06-28T15:44:20.919Z