Small Injective Rings

Details Small Injective Rings Small Injective Rings

2005-05-21

arxiv.org/abs/math/0505445v1

Mathematics

Rings and Algebras

14 pages

Scientific paper

Let $R$ be a ring, a right ideal $I$ of $R$ is called small if for every proper right ideal $K$ of $R$, $I+K\neq R$. A ring $R$ is called right small injective if every homomorphism from a small right ideal to $R_{R}$ can be extended to an $R$-homomorphism from $R_{R}$ to $R_{R}$. Properties of small injective rings are explored and several new characterizations are given for $QF$ rings and $PF$ rings, respectively.

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