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Spring 2012 A few examples of local rings, I
Jun-ichi Nishimura
Kyoto J. Math. 52(1): 51-87 (Spring 2012). DOI: 10.1215/21562261-1503754


In this paper, we first recall and apply the fundamental techniques of constructing bad Noetherian local domains, due to C. Rotthaus, T. Ogoma, R. C. Heitmann, and M. Brodmann and C. Rotthaus, to show several basic examples:

(1) a three-dimensional Nagata normal local domain, which is a complete intersection, whose regular locus is not open;

(2) a three-dimensional Henselian Nagata normal local domain, which is not catenary.

Next we present a unified version of Brodmann and Rotthaus’s and Ogoma’s methods in order to obtain a particular local domain A with a specified prime element x such that the local domain A/xA is the bad Noetherian local domain given above:

(3) a three-dimensional unmixed local domain A that has xA=pSpec(A) such that A/p is not unmixed.

Finally we follow Ogoma’s construction of factorial local domains whose completions are designated complete local domains. Then, we gather some examples of bad factorial local domains.


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Jun-ichi Nishimura. "A few examples of local rings, I." Kyoto J. Math. 52 (1) 51 - 87, Spring 2012.


Published: Spring 2012
First available in Project Euclid: 19 February 2012

zbMATH: 1241.13016
MathSciNet: MR2892767
Digital Object Identifier: 10.1215/21562261-1503754

Primary: 13E05, 13H05, 13H10
Secondary: 13C15, 13C40, 13G05

Rights: Copyright © 2012 Kyoto University


Vol.52 • No. 1 • Spring 2012
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