English

Tilting theory for extended module categories

Representation Theory 2025-01-09 v2 Category Theory Rings and Algebras

Abstract

In extended hearts of bounded tt-structures on a triangulated category, we provide a Happel-Reiten-Smalo tilting theorem and a characterization for ss-torsion pairs. Applying these to mm-extended module categories, we characterize torsion pairs induced by (m+1)(m+1)-term silting complexes. After establishing Auslander-Reiten theory in extended module categories, we introduce τ[m]\tau_{[m]}-tilting pairs and show bijections between τ[m]\tau_{[m]}-tilting pairs, (m+1)(m+1)-term silting complexes, and functorially finite ss-torsion pairs.

Keywords

Cite

@article{arxiv.2411.15473,
  title  = {Tilting theory for extended module categories},
  author = {Yu Zhou},
  journal= {arXiv preprint arXiv:2411.15473},
  year   = {2025}
}

Comments

v2: added Proposition 2.8 to correct an error in the proof of Theorem 4.7, included several corollaries at the end of Section 4,fixed typos, and made other small changes to the exposition. 32 pages, comments welcome

R2 v1 2026-06-28T20:09:53.001Z