On the Goldie dimension of rings and modules

[摘要] We find a bound for the Goldie dimension of hereditary modules in terms of the cardinality of the generating sets of their quasi-injective hulls. Several consequences are deduced. In particular, it is shown that every finitely generated hereditary module with countably generated quasi-injective hull is noetherian. It is also shown that every right hereditary ring with finitely generated injective hull is right artinian, thus answering a long standing open question posed by Dung, Gomez Pardo and Wisbauer. (c) 2006 Elsevier Inc. All rights reserved.

[发布日期] 2006-11-15

[关键词] Goldie dimension;hereditary rings;Noetherian rings