On two extension of dicksons torsion theory
作者:
Jorge Picado,
期刊:
Communications in Algebra
(Taylor Available online 1993)
卷期:
Volume 21,
issue 8
页码: 2749-2769
ISSN:0092-7872
年代: 1993
DOI:10.1080/00927879308824704
出版商: Gordon and Breach Science Publishers Ltd.
数据来源: Taylor
摘要:
We establish relations between two extensions of Dickson's torsion theory, one introduced by Barr and the other by Cassidy, Hubert and Kelly. These two notions are studied in a general category and we show that categories with zero object are, in some sense, the ones where the second notion is relevant. In these categories, under suitable completeness conditions, we characterize torsion theories in terms of reflections and connections. A characterization of the torsion-free subcategories which generalizes the one of Dickson is also presented.
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