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Classifying $t$-structures via ICE-closed subcategories and a lattice of torsion classes

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arxiv 2307.11347 v2 pith:3GPPNXTV submitted 2023-07-21 math.RT

classification math.RT
keywords lambdamathsfice-closedsequencestructuresubcategoriesbijectionbounded
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abstract

In a triangulated category equipped with a $t$-structure, we investigate a relation between ICE-closed (=Image-Cokernel-Extension-closed) subcategories of the heart of the $t$-structure and aisles in the triangulated categories. We introduce an ICE sequence, a sequence of ICE-closed subcategories satisfying a certain condition, and establish a bijection between ICE sequences and homology-determined preaisles. Moreover we give a sufficient condition that an ICE sequence induces a $t$-structure via the bijection. In the case of the bounded derived category $D^b({\mathsf{mod}}\Lambda)$ of a $\tau$-tilting finite algebra $\Lambda$, we give a description of ICE sequences in ${\mathsf{mod}}\Lambda$ which induce bounded $t$-structures on $D^b({\mathsf{mod}}\Lambda)$ from the viewpoint of a lattice consisting of torsion classes in ${\mathsf{mod}}\Lambda$.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Telescope conjecture for t-structures over noetherian path algebras

    math.RT 2025-05 accept novelty 7.0 of 10

    Homotopically smashing t-structures over noetherian Dynkin path algebras are compactly generated, with a full classification by poset morphisms from Spec(R) to Filt(Nc(Q)).

  2. ICE-closed subcategories and epibricks over recollements

    math.RT 2025-02 conditional novelty 5.0 of 10

    Over a recollement of abelian categories, ICE-closed subcategories, epibricks and monobricks glue and reduce along the recollement, yielding a bijection for ICE-closed subcategories under a natural containment condition.

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