The Uniqueness Of Minimal Acyclic Complexes

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The Uniqueness Of Minimal Acyclic Complexes

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Title: The Uniqueness Of Minimal Acyclic Complexes
Author: Hughes, Meri Trema
Abstract: In this paper, we discuss conditions for uniqueness among minimal acyclic complexes of finitely generated free modules over a commutative local ring which share a common syzygy module. Although such uniqueness occurs over Gorenstein rings, the question has been asked whether two minimal acyclic complexes in general can be isomorphic to the left and non-isomorphic to the right. We answer the question in the negative for certain cases, including periodic complexes, sesqui-acyclic complexes, and certain rings with radical cube zero. In particular, we investigate the question for graded algebras with Hilbert series $H_R(t)=1+et+(e-1)t^2$, and such monomial algebras possessing a special generator.
Date: 2009-09-16
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