In this paper, we consider the openness of the P-locus of a finitely generated module over a commutative noetherian ring in the case where P is each of the properties FID, Gor, Can, CM, MCM, (Sn), and (Tn). One of the main results asserts that FID-loci over an acceptable ring are open. We give a module version of the Nagata criterion, and prove that it holds for all of the aforementioned properties.& COPY; 2023 Elsevier Inc. All rights reserved.
机构:
Hunan Normal Univ, Coll Math & Stat, Minist Educ, HPCSIP, Changsha 410081, Hunan, Peoples R ChinaHunan Normal Univ, Coll Math & Stat, Minist Educ, HPCSIP, Changsha 410081, Hunan, Peoples R China
Li, Liping
Yu, Nina
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机构:
Xiamen Univ, Sch Math Sci, Xiamen 361005, Fujian, Peoples R ChinaHunan Normal Univ, Coll Math & Stat, Minist Educ, HPCSIP, Changsha 410081, Hunan, Peoples R China