Extensions of McCoy Rings

Details Extensions of McCoy Rings Extensions of McCoy Rings

2007-08-14

arxiv.org/abs/0708.1789v1

Mathematics

Rings and Algebras

10 pages

Scientific paper

A ring $R$ is said to be right McCoy if the equation $f(x)g(x)=0,$ where $f(x)$ and $g(x)$ are nonzero polynomials of $R[x],$ implies that there exists nonzero $s \in R$ such that $f(x)s = 0$. It is proven that no proper (triangular) matrix ring is one-sided McCoy. If there exists the classical right quotient ring $Q$ of a ring $R$, then $R$ is right McCoy if and only if $Q$ is right McCoy. It is shown that for many polynomial extensions, a ring $R$ is right McCoy if and only if the polynomial extension over $R$ is right McCoy. Other basic extensions of right McCoy rings are also studied.\leftskip0truemm \rightskip0truemm \{\it Keywords}: matrix ring, McCoy ring, polynomial ring, upper triangular matrix ring.

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