The set of trace ideals of curve singularities
Commutative Algebra
2022-03-10 v1
Abstract
This paper mainly focuses on commutative local domains of dimension one. We then obtain a criterion for a ring to have a finite number of trace ideals in terms of integrally closed ideals. We also explore properties of such rings related to birational extensions, reflexive ideals, and reflexive Ulrich modules. Special attention is given in the case of numerical semigroup rings of non-gap four. We then obtain a criterion for a ring to have a finite number of reflexive ideals up to isomorphism. Non-domains arising from fiber products are also explored.
Keywords
Cite
@article{arxiv.2203.04469,
title = {The set of trace ideals of curve singularities},
author = {Toshinori Kobayashi and Shinya Kumashiro},
journal= {arXiv preprint arXiv:2203.04469},
year = {2022}
}
Comments
22 pages