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Singularity Categories of Higher Nakayama Algebras

Representation Theory 2024-10-08 v2

Abstract

For a higher Nakayama algebra AA in the sense of Jasso-K\"{u}lshammer, we show that the singularity category of AA is triangulated equivalent to the stable module category of a self-injective higher Nakayama algebra. This generalizes a similar result for usual Nakayama algebras due to Shen. Our proof relies on the existence of dZd\mathbb{Z}-cluster tilting subcategories in the module category of AA and the result of Kvamme that each dZd\mathbb{Z}-cluster tilting subcategory of AA induces a dZd\mathbb{Z}-cluster tilting subcategory in its singularity category. Moreover, our result provides many concrete examples of the triangulated Auslander-Iyama correspondence introduced by Jasso-Muro, namely, there is a bijective correspondence between the equivalence classes of the singularity categories of dd-Nakayama algebras with its basic dZd\mathbb{Z}-cluster tilting object and the isomorphism classes of self-injective (d+1)(d+1)-Nakayama algebras.

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Cite

@article{arxiv.2306.07006,
  title  = {Singularity Categories of Higher Nakayama Algebras},
  author = {Wei Xing},
  journal= {arXiv preprint arXiv:2306.07006},
  year   = {2024}
}

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23 pages