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 -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}
}