2-GOOD RINGS

2-GOOD RINGS
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DOI:
10.1093/qmath/hah046
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发表时间:
2005-09
影响因子:
0.7
通讯作者:
P. Vámos
P. Vámos
中科院分区:
数学3区
文献类型:
--
作者:
P. Vámos

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一个环R称为k-好的,如果每个元素都是k个单位的和。我们证明了秩至少为2的自由模的自同态环是3-好的,并且每个环都可以嵌入2-好环。讨论了Skornjakov的一个问题,证明了(右)自内射von Neumann正则环是2-好的,只要它没有2-挠.这推广了Zelinsky关于向量空间的线性变换环的一个结果。
A ring R is said to be k-good if every element is the sum of k units. We show that the endomorphism ring of a free module of rank at least 2 is 3-good and that every ring can be embedded in a 2-good ring. Answering a question of Skornjakov, we show that a (right) self-injective von Neumann regular ring is 2-good provided it has no 2-torsion. This generalizes a result of Zelinsky's on the ring of linear transformations of a vector space.