English

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

Representation Theory 2023-10-30 v2

Abstract

In a triangulated category equipped with a tt-structure, we investigate a relation between ICE-closed (=Image-Cokernel-Extension-closed) subcategories of the heart of the tt-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 tt-structure via the bijection. In the case of the bounded derived category Db(modΛ)D^b({\mathsf{mod}}\Lambda) of a τ\tau-tilting finite algebra Λ\Lambda, we give a description of ICE sequences in modΛ{\mathsf{mod}}\Lambda which induce bounded tt-structures on Db(modΛ)D^b({\mathsf{mod}}\Lambda) from the viewpoint of a lattice consisting of torsion classes in modΛ{\mathsf{mod}}\Lambda.

Keywords

Cite

@article{arxiv.2307.11347,
  title  = {Classifying $t$-structures via ICE-closed subcategories and a lattice of torsion classes},
  author = {Arashi Sakai},
  journal= {arXiv preprint arXiv:2307.11347},
  year   = {2023}
}

Comments

16 pages, reference updated