Commutative rings and modules that are Nil-coherent or special Nil-coherent

KA Ismaili, DE Dobbs, N Mahdou - Journal of Algebra and Its …, 2017 - World Scientific
KA Ismaili, DE Dobbs, N Mahdou
Journal of Algebra and Its Applications, 2017World Scientific
Recently, Xiang and Ouyang defined a (commutative unital) ring R to be Nil*-coherent if
each finitely generated ideal of R that is contained in Nil (R) is a finitely presented R-module.
We define and study Nil*-coherent modules and special Nil*-coherent modules over any
ring. These properties are characterized and their basic properties are established. Any
coherent ring is a special Nil*-coherent ring and any special Nil*-coherent ring is a Nil*-
coherent ring, but neither of these statements has a valid converse. Any reduced ring is a …
Recently, Xiang and Ouyang defined a (commutative unital) ring to be Nil-coherent if each finitely generated ideal of that is contained in Nil is a finitely presented -module. We define and study Nil-coherent modules and special Nil-coherent modules over any ring. These properties are characterized and their basic properties are established. Any coherent ring is a special Nil-coherent ring and any special Nil-coherent ring is a Nil-coherent ring, but neither of these statements has a valid converse. Any reduced ring is a special Nil-coherent ring (regardless of whether it is coherent). Several examples of Nil-coherent rings that are not special Nil-coherent rings are obtained as byproducts of our study of the transfer of the Nil-coherent and the special Nil-coherent properties to trivial ring extensions and amalgamated algebras.
World Scientific
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