English

Tensor products of higher almost split sequences

Representation Theory 2019-04-09 v2

Abstract

We investigate how the higher almost split sequences over a tensor product of algebras are related to those over each factor. Herschend and Iyama gave a precise criterion for when the tensor product of an nn-representation finite algebra and an mm-representation finite algebra is (n+m)(n+m)-representation finite. In this case we give a complete description of the higher almost split sequences over the tensor product by expressing every higher almost split sequence as the mapping cone of a suitable chain map and using a natural notion of tensor product for chain maps.

Keywords

Cite

@article{arxiv.1505.04980,
  title  = {Tensor products of higher almost split sequences},
  author = {Andrea Pasquali},
  journal= {arXiv preprint arXiv:1505.04980},
  year   = {2019}
}

Comments

20 pages

R2 v1 2026-06-22T09:37:06.537Z