Calabi-Yau objects in triangulated categories

Details Calabi-Yau objects in triangulated categories Calabi-Yau objects in triangulated categories

2006-12-22

arxiv.org/abs/math/0612689v1

Mathematics

Representation Theory

18 pages

Scientific paper

We introduce the Calabi-Yau (CY) objects in a Hom-finite Krull-Schmidt triangulated $k$-category, and notice that the structure of the minimal, consequently all the CY objects, can be described. The relation between indecomposable CY objects and Auslander-Reiten triangles is provided. Finally we classify all the CY modules of self-injective Nakayama algebras, determining this way the self-injective Nakayama algebras admitting indecomposable CY modules. In particular, this result recovers the algebras whose stable categories are Calabi-Yau, which have been obtained in [BS].

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