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Proceedings of the American Mathematical Society

ISSN 1088-6826(online) ISSN 0002-9939(print)



$ n$-Gorenstein rings

Author: Hans Bjørn Foxby
Journal: Proc. Amer. Math. Soc. 42 (1974), 67-72
MSC: Primary 13H10
MathSciNet review: 0323784
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Abstract: The object of this note is to study commutative noetherian n-Gorenstein rings. The first result is: if each module satisfying Samuel's conditions $ ({{\text{a}}_i})$ for some $ i \leqq n$ is an ith syzygy, then the ring is n-Gorenstein. This is the converse to a theorem of Ischebeck. The next result characterizes n-Gorenstein rings in terms of commutativity of certain rings of endomorphisms. This answers a question of Vasconcelos. Finally the last result deals with embedding of finitely generated modules into finitely generated modules of finite projective dimension.

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Keywords: $ ({{\text{a}}_n})$- and $ ({{\text{b}}_n})$-module, nth syzgy, module without n-torsion
Article copyright: © Copyright 1974 American Mathematical Society

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