Torsion pairs in categories of modules on ringed finite sites
Representation Theory
2025-06-23 v2
Abstract
Let be a small category. In this paper, we mainly study the category of modules on ringed sites . We firstly reprove the Theorem A of the paper (M. Wu and F. Xu. Skew category algebras and modules on ringed finite sites. J. A. 631, 2023), then we characterize in terms of the torsion modules on , where is the linear Grothendieck construction of . Finally, we investigate the hereditary torsion pairs, TTF triples and Abelian recollements of . When is finite, the complete classifications of all these are given respectively.
Keywords
Cite
@article{arxiv.2403.15001,
title = {Torsion pairs in categories of modules on ringed finite sites},
author = {Mawei Wu},
journal= {arXiv preprint arXiv:2403.15001},
year = {2025}
}
Comments
16 pages, final version, accepted for publication in Communications in Algebra