English

Torsion pairs via the Ziegler spectrum

Representation Theory 2024-03-04 v1 Rings and Algebras

Abstract

We establish a bijection between torsion pairs in the category of finite-dimensional modules over a finite-dimensional algebra A and pairs (Z, I) formed by a closed rigid set Z in the Ziegler spectrum of A and a set I of indecomposable injective A-modules. This can be regarded as an extension of a result from τ\tau-tilting theory which parametrises the functorially finite torsion pairs over A. We also obtain a one-one-correspondence between finite-dimensional bricks and certain (possibly infinite-dimensional) indecomposable modules satisfying a rigidity condition. Our results also hold when A is an artinian ring.

Keywords

Cite

@article{arxiv.2403.00475,
  title  = {Torsion pairs via the Ziegler spectrum},
  author = {Lidia Angeleri Hügel and Rosanna Laking and Francesco Sentieri},
  journal= {arXiv preprint arXiv:2403.00475},
  year   = {2024}
}