Commutative graded-$n$-coherent and graded valuation rings

Abstract

Let $R= \oplus_{ \alpha \in G} R_{\alpha}$ be a commutative ring with unity graded by an arbitrary grading commutative monoid $G$. For each positive integer, the notions of a graded-n-coherent module and a graded-n-coherent ring are introduced. In this paper many results are generalized from $n$-coherent rings to graded-$n$-coherent rings. In the last section, we provide necessary and sufficient conditions for the graded trivial extension ring to be a graded-valuation ring.

Keywords

• coherent rings and modules
• n-coherent rings and modules
• graded modules and rings
• graded-coherent rings and modules
• graded-valuation rings
• graded trivial extension ring

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