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 .

生成讲解博客的中文版本

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