Sequences of ICE-closed subcategories via preordered $\tau^{-1}$-rigid modules
Abstract
Let be a finite-dimensional basic algebra. Sakai recently used certain sequences of image-cokernel-extension-closed (ICE-closed) subcategories of finitely generated -modules to classify certain (generalized) intermediate -structures in the bounded derived category. We classifying these "contravariantly finite ICE-sequences" using concepts from -tilting theory. More precisely, we introduce "cogen-preordered -rigid modules" as a generalization of (the dual of) the "TF-ordered -rigid modules" of Mendoza and Treffinger. We then establish a bijection between the set of cogen-preordered -rigid modules and certain sequences of intervals of torsion-free classes. Combined with the results of Sakai, this yields a bijection with the set of contravariantly finite ICE-sequences (of finite length), and thus also with the set of -intermediate -structures whose aisles are homology-determined.
Keywords
Cite
@article{arxiv.2410.01963,
title = {Sequences of ICE-closed subcategories via preordered $\tau^{-1}$-rigid modules},
author = {Eric J. Hanson},
journal= {arXiv preprint arXiv:2410.01963},
year = {2024}
}
Comments
15 pages