Quasi-Koszulity and minimal Horseshoe Lemma
Abstract
In this paper, the criteria for minimal Horseshoe Lemma to be true are given via quasi-δ-Koszul modules, which are the nongraded version of δ-Koszul modules first introduced by Green and Marcos in 2005. Moreover, some applications of minimal Horseshoe Lemma are also given.
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