Silting objects

L Angeleri Hügel - Bulletin of the London Mathematical Society, 2019 - Wiley Online Library
We give an overview of recent developments in silting theory. After an introduction on torsion
pairs in triangulated categories, we discuss and compare different notions of silting and …

{\tau}-exceptional sequences and the shard intersection order in type A

EJ Hanson - arXiv preprint arXiv:2303.11517, 2023 - arxiv.org
Reading's" shard intersection order" on the symmetric group can be realized as the" lattice of
wide subcategories" of the corresponding preprojective algebra. In this paper, we first use …

-PERPENDICULAR WIDE SUBCATEGORIES

AB Buan, EJ Hanson - Nagoya Mathematical Journal, 2023 - cambridge.org
Let $\Lambda $ be a finite-dimensional algebra. A wide subcategory of $\mathsf
{mod}\Lambda $ is called left finite if the smallest torsion class containing it is functorially …

τ-exceptional sequences

AB Buan, BR Marsh - Journal of Algebra, 2021 - Elsevier
We introduce the notions of τ-exceptional and signed τ-exceptional sequences for any finite
dimensional algebra. We prove that for a fixed algebra of rank n, and for any positive integer …

A Uniqueness Property of -Exceptional Sequences

EJ Hanson, H Thomas - Algebras and Representation Theory, 2024 - Springer
Abstract Recently, Buan and Marsh showed that if two complete τ-exceptional sequences
agree in all but at most one term, then they must agree everywhere, provided the algebra is τ …

A geometric perspective on the -cluster morphism category

S Schroll, A Tattar, H Treffinger, NJ Williams - arXiv preprint arXiv …, 2023 - arxiv.org
arXiv:2302.12217v2 [math.RT] 19 Apr 2023 Page 1 arXiv:2302.12217v2 [math.RT] 19 Apr
2023 A GEOMETRIC PERSPECTIVE ON THE τ-CLUSTER MORPHISM CATEGORY SIBYLLE …

A 𝜏-tilting approach to the first Brauer-Thrall conjecture

S Schroll, H Treffinger - Proceedings of the American Mathematical Society, 2022 - ams.org
In this paper we study the behaviour of modules over finite dimensional algebras whose
endomorphism algebra is a division ring. We show that there are finitely many such modules …

Silting reduction and picture categories of 0-Auslander extriangulated categories

ED Børve - arXiv preprint arXiv:2405.00593, 2024 - arxiv.org
Let $\mathcal {C} $ be an extriangulated category and let $\mathcal {R}\subseteq\mathcal
{C} $ be a rigid subcategory. Generalizing Iyama--Yang silting reduction, we devise a …

Mutating signed-exceptional sequences

AB Buan, BR Marsh - Glasgow Mathematical Journal, 2023 - cambridge.org
We establish some properties of $\tau $-exceptional sequences for finite-dimensional
algebras. In an earlier paper, we established a bijection between the set of ordered support …

Two-term silting and -cluster morphism categories

ED Børve - arXiv preprint arXiv:2110.03472, 2021 - arxiv.org
We generalise $\tau $-cluster morphism categories to non-positive proper dg algebras. The
compatibility of silting reduction with support $\tau $-tilting reduction will be an essential …