English

$nd\mathbb{Z}$-cluster tilting subcategories of $d$-Nakayama algebras

Representation Theory 2026-04-14 v2

Abstract

Jasso-K\"{u}lshammer introduced the class of dd-Nakayama algebras as a higher dimensional analogue of Nakayama algebras. In particular, they are endowed with a distinguished dZd\mathbb{Z}-cluster tilting subcategory. In this paper, we investigate which dd-Nakayama algebras admit an ndZnd\mathbb{Z}-cluster tilting subcategory for n>1n>1. The radical square zero case is already covered by results on classical Nakayama algebras due to Herschend-Kvamme-Vaso. For each remaining non-self-injective dd-Nakayama algebra, we provide a complete classification of its ndZnd\mathbb{Z}-cluster tilting subcategories. In fact, there exists at most one for a suitable integer nn. A self-injective dd-Nakayama algebra is determined by two positive integers mm and ll. We show that an ndZnd\mathbb{Z}-cluster tilting subcategory is only possible if nmn|m and n(l2)n|(l-2). In case n=l2n=l-2, we show that such subcategory does indeed exist by constructing an explicit example.

Keywords

Cite

@article{arxiv.2603.28236,
  title  = {$nd\mathbb{Z}$-cluster tilting subcategories of $d$-Nakayama algebras},
  author = {Wei Xing},
  journal= {arXiv preprint arXiv:2603.28236},
  year   = {2026}
}