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JOURNALS // Sibirskie Èlektronnye Matematicheskie Izvestiya [Siberian Electronic Mathematical Reports] // Archive

Sib. Èlektron. Mat. Izv., 2011 Volume 8, Pages 116–122 (Mi semr309)

Transparent Ore extensions over weak $\sigma$-rigid rings

V. K. Bhat, Kiran Chib

School of Mathematics, SMVD University, Katra, 182320, J and K, India

Abstract: Recall that a Noetherian ring $R$ is said to be a Transparent ring if there exist irreducible ideals $I_j$, $1\leq j\leq n$ such that $\bigcap_{j=1}^n I_j = 0$ and each $R/I_j$ has a right Artinian quotient ring. Let $R$ be a commutative Noetherian ring, which is also an algebra over $\mathbb Q$ (the field of rational numbers); $\sigma$ an automorphism of $R$ and $\delta$ a $\sigma$-derivation of $R$. Also let $R$ be a weak $\sigma$-rigid ring (i.e. $a\sigma(a)\in N(R)$ if and only if $a\in N(R)$, where $N(R)$ the set of nilpotent elements of R). Then we prove that $R[x;\sigma,\delta]$ is a Transparent ring.

Keywords: automorphism, $\sigma$-derivation, weak $\sigma$-rigid ring, quotient ring, transparent ring.

UDC: 512.552.24

MSC: 16S36

Received May 26, 2011, published June 23, 2011

Language: English



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