On locally divided integral domains and CPI-overrings

David E. Dobbs

International Journal of Mathematics and Mathematical Sciences, 1981, vol. 4, 1-17

Abstract:

It is proved that an integral domain R is locally divided if and only if each CPI-extension of ℬ (in the sense of Boisen and Sheldon) is R -flat (equivalently, if and only if each CPI-extension of R is a localization of R ). Thus, each CPI-extension of a locally divided domain is also locally divided. Treed domains are characterized by the going-down behavior of their CPI-extensions. A new class of (not necessarily treed) domains, called CPI-closed domains, is introduced. Examples include locally divided domains, quasilocal domains of Krull dimension 2 , and qusilocal domains with the QQR-property. The property of being CPI-closed behaves nicely with respect to the D + M construction, but is not a local property.

Date: 1981
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Persistent link: https://EconPapers.repec.org/RePEc:hin:jijmms:108278

DOI: 10.1155/S0161171281000082

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