English

Are special biserial algebras homologically tame?

Representation Theory 2022-03-09 v3

Abstract

Birge Huisgen-Zimmermann calls a finite dimensional algebra homologically tame provided the little and the big finitistic dimension are equal and finite. The question formulated in the title has been discussed by her in the paper "Representation-tame algebras need not be homologically tame", by looking for any r>0r > 0 at a sequence of algebras Λm\Lambda_m with big finitistic dimension r+mr+m. As we will show, also the little finitistic dimension of Λm\Lambda_m is r+m. It follows that contrary to her assertion, all her algebras Λm\Lambda_m are homologically tame.

Keywords

Cite

@article{arxiv.2106.04924,
  title  = {Are special biserial algebras homologically tame?},
  author = {Claus Michael Ringel},
  journal= {arXiv preprint arXiv:2106.04924},
  year   = {2022}
}

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6 pages