Filtrations in abelian categories with a tilting object of homological dimension two
Representation Theory
2010-07-21 v1 K-Theory and Homology
Abstract
We consider filtrations of objects in an abelian category induced by a tilting object of homological dimension at most two. We define three disjoint subcategories with no maps between them in one direction, such that each object has a unique filtation with factors in these categories. This filtration coincides with the the classical two-step filtration induced by torsion pairs in dimension one. We also give a refined filtration, using the derived equivalence between the derived categories of and the module category of . The factors of this filtration consist of kernel and cokernels of maps between objects which are quasi-isomorphic to shifts of -modules via the derived equivalence .
Keywords
Cite
@article{arxiv.1007.3428,
title = {Filtrations in abelian categories with a tilting object of homological dimension two},
author = {Bernt Tore Jensen and Dag Madsen and Xiuping Su},
journal= {arXiv preprint arXiv:1007.3428},
year = {2010}
}