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RINGS IN WHICH ELEMENTS ARE UNIQUELY THE SUM OF AN IDEMPOTENT AND A UNIT

2004· article· en· 144 citations· W2126747464 on OpenAlex· 10.1017/s0017089504001727

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All three models called this out of scope.

stratum: aff_core · design weight: 5595.24 (the sample is stratified; any rate computed without the weight is wrong)
Claude Opus 4.8OUT
genre: conceptual
about Canada: no
confidence: high

Abstract algebra result on uniquely clean rings; pure mathematics.

GPT-5.6 (high)OUT
genre: conceptual
about Canada: no
confidence: high

This is a mathematical study of ring structures, not research practice or the research system.

Grok 4.5OUT
genre: conceptual
about Canada: no
confidence: high

Pure ring theory in algebra; mathematics of clean rings, not a study of research practice.

Abstract

An associative ring with unity is called clean if every element is the sum of an idempotent and a unit; if this representation is unique for every element, we call the ring uniquely clean . These rings represent a natural generalization of the Boolean rings in that a ring is uniquely clean if and only if it is Boolean modulo the Jacobson radical and idempotents lift uniquely modulo the radical. We also show that every image of a uniquely clean ring is uniquely clean, and construct several noncommutative examples.

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The record

Venue
Glasgow Mathematical Journal
Topic
Rings, Modules, and Algebras
Field
Mathematics
Canadian institutions
Memorial University of NewfoundlandUniversity of Calgary
Funders
Natural Sciences and Engineering Research Council of CanadaUniversity of Calgary
Keywords
MathematicsIdempotenceModuloUnit (ring theory)Ring (chemistry)Element (criminal law)Lift (data mining)GeneralizationBoolean ringAssociative propertyPure mathematicsCombinatoricsPrincipal ideal ringDiscrete mathematicsCommutative ringCommutative propertyComputer scienceChemistry
Has abstract in OpenAlex
yes