English

Reducibility of parameter ideals in low powers of the maximal ideal

Commutative Algebra 2020-06-11 v2

Abstract

A commutative noetherian local ring (R,m)(R,\mathfrak{m}) is Gorenstein if and only if every parameter ideal of RR is irreducible. Although irreducible parameter ideals may exist in non-Gorenstein rings, Marley, Rogers, and Sakurai show there exists an integer \ell (depending on RR) such that RR is Gorenstein if and only if there exists an irreducible parameter ideal contained in m\mathfrak{m}^\ell. We give upper bounds for \ell that depend primarily on the existence of certain systems of parameters in low powers of the maximal ideal.

Keywords

Cite

@article{arxiv.1911.06004,
  title  = {Reducibility of parameter ideals in low powers of the maximal ideal},
  author = {Katharine Shultis and Peder Thompson},
  journal= {arXiv preprint arXiv:1911.06004},
  year   = {2020}
}

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13 pages