English

$n\mathbb{Z}$-cluster tilting subcategories for Nakayama algebras

Representation Theory 2022-08-30 v1

Abstract

nZn\mathbb{Z}-cluster tilting subcategories are an ideal setting for higher dimensional Auslander-Reiten theory. We give a complete classification of nZn\mathbb{Z}-cluster tilting subcategories of module categories of Nakayama algebras. In particular, we show that there are three kinds of Nakayama algebras that admit nZn\mathbb{Z}-cluster tilting subcategories: finite global dimension, selfinjective and non-Iwanaga-Gorenstein. Only the selfinjective ones can admit more than one nZn\mathbb{Z}-cluster tilting subcategory. It has been shown by the second author, that each such nZn\mathbb{Z}-cluster tilting subcategory induces an nZn\mathbb{Z}-cluster tilting subcategory of the corresponding singularity category. For each Nakayama algebra in our classification, we describe its singularity category, the canonical functor from its module category to its singularity category, and provide a complete comparison of nZn\mathbb{Z}-cluster tilting subcategories in the module category and the singularity category. This relies heavily of results by Shen, who described the singularity categories of all Nakayama algebras.

Cite

@article{arxiv.2208.13257,
  title  = {$n\mathbb{Z}$-cluster tilting subcategories for Nakayama algebras},
  author = {Martin Herschend and Sondre Kvamme and Laertis Vaso},
  journal= {arXiv preprint arXiv:2208.13257},
  year   = {2022}
}

Comments

33 pages