A refinement of Gorenstein flat dimension via the flat--cotorsion theory
Rings and Algebras
2020-09-29 v2
Abstract
We introduce a refinement of the Gorenstein flat dimension for complexes over an associative ring--the Gorenstein flat-cotorsion dimension--and prove that it, unlike the Gorenstein flat dimension, behaves as one expects of a homological dimension without extra assumptions on the ring. Crucially, we show that it coincides with the Gorenstein flat dimension for complexes where the latter is finite, and for complexes over right coherent rings--the setting where the Gorenstein flat dimension is known to behave as expected.
Keywords
Cite
@article{arxiv.1912.06575,
title = {A refinement of Gorenstein flat dimension via the flat--cotorsion theory},
author = {Lars Winther Christensen and Sergio Estrada and Li Liang and Peder Thompson and Dejun Wu and Yang Gang},
journal= {arXiv preprint arXiv:1912.06575},
year = {2020}
}
Comments
Final version, to appear i J. Algebra; 21 pp