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Let be an additive category equipped with an automorphism . We show how to obtain -angulations of using some particular periodic injective resolutions. We give necessary and sufficient conditions on admitting an -angulation. Then we apply these characterizations to explain the standard construction of -angulated categories and the -angulated categories arising from some local rings. Moreover, we obtain a class of new examples of -angulated categories from quasi-periodic selfinjective algebras.

生成讲解博客的中文版本

生成AI智能校验的中文版本