English

Trace ideals, conductors, and ideals of finite (phantom) projective dimension

Commutative Algebra 2025-01-29 v2

Abstract

In this paper, we consider whether parameter test ideals, conductors, FF-ideals, and trace ideals are contained in an ideal whose quotient ring has finite phantom projective dimension (for example, ideals generated by a system of parameters or ideals with finite projective dimension). One of the main results asserts that such inclusions do not exist in quasi-Gorenstein complete local domains. We also provide examples of Cohen-Macaulay local rings with good properties where such inclusions occur, thus answering negatively a question of Huneke-Swanson.

Keywords

Cite

@article{arxiv.2501.03442,
  title  = {Trace ideals, conductors, and ideals of finite (phantom) projective dimension},
  author = {Kaito Kimura},
  journal= {arXiv preprint arXiv:2501.03442},
  year   = {2025}
}

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14 pages