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

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 $\mathsf{mod}\Lambda$.

16 pages, reference updated