
A right ideal I of a ring R is local if \(x\in R\), \(\{x_ 1,...,x_ n\}\subseteq I\) and \((x-x_ 1)R(x-x_ 2)...(x-x_{n-1})R(x-x_ n)=0\) imply that \(x\in I\), and an ideal P of R is pseudoprime if P contains a prime ideal of R. A ring R is normal if x,y\(\in R\) and \(xRy=0\) imply that \(ann(x)+ann(y)=R\), and R is neocommutative if the product of any two finitely generated ideals is finitely generated. The following results are established: if R is a neocommutative ring with identity then (a) an ideal of R is local if and only if it is an intersection of pseudoprime ideals, and (b) if R is normal, then every right ideal is local, and if R is commutative and every principal ideal of R is local, then R is normal. These results generalize results established by \textit{J. C. Dyre} [Math. Scand. 50, 44-54 (1982; Zbl 0468.46016)]. Our assumption that R be neocommutative has been relaxed by \textit{G. Mason} and \textit{R. Raphael} [A propos des ideaux locaux: corrigendum et addendum, Ann. Sci. Math. Qué. (to appear)].
finitely generated ideals, neocommutative ring, Structure and classification for modules, bimodules and ideals (except as in 16Gxx), direct sum decomposition and cancellation in associative algebras), normal ring, Article, principal ideal, intersection of pseudoprime ideals, 510.mathematics, local ideal, Ideals and multiplicative ideal theory in commutative rings, prime ideal, Modules, bimodules and ideals in associative algebras
finitely generated ideals, neocommutative ring, Structure and classification for modules, bimodules and ideals (except as in 16Gxx), direct sum decomposition and cancellation in associative algebras), normal ring, Article, principal ideal, intersection of pseudoprime ideals, 510.mathematics, local ideal, Ideals and multiplicative ideal theory in commutative rings, prime ideal, Modules, bimodules and ideals in associative algebras
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