Some applications of extriangulated categories

Y Palu - arXiv preprint arXiv:2307.10019, 2023 - arxiv.org
Extriangulated categories axiomatize extension-closed subcategories of triangulated
categories and generalise both exact categories and triangulated categories. This survey …

Associahedra for finite‐type cluster algebras and minimal relations between g‐vectors

A Padrol, Y Palu, V Pilaud… - Proceedings of the …, 2023 - Wiley Online Library
We show that the mesh mutations are the minimal relations among the gg‐vectors with
respect to any initial seed in any finite‐type cluster algebra. We then use this algebraic result …

On exact dg categories

X Chen - arXiv preprint arXiv:2306.08231, 2023 - arxiv.org
We introduce the notion of an exact dg category, which is a simultaneous generalization of
the notions of exact category in the sense of Quillen and of pretriangulated dg category in …

Positive and negative extensions in extriangulated categories

M Gorsky, H Nakaoka, Y Palu - arXiv preprint arXiv:2103.12482, 2021 - arxiv.org
We initiate the study of derived functors in the setting of extriangulated categories. By using
coends, we adapt Yoneda's theory of higher extensions to this framework. We show that …

Tilting subcategories in extriangulated categories

B Zhu, X Zhuang - Frontiers of Mathematics in China, 2020 - Springer
Extriangulated category was introduced by H. Nakaoka and Y. Palu to give a unification of
properties in exact categories and triangulated categories. A notion of tilting (resp., cotilting) …

Extriangulated ideal quotients, with applications to cluster theory and gentle algebras

X Fang, M Gorsky, Y Palu, PG Plamondon… - arXiv preprint arXiv …, 2023 - arxiv.org
We extend results of Br\" ustle-Yang on ideal quotients of 2-term subcategories of perfect
derived categories of non-positive dg algebras to a relative setting. We find a new …

Hereditary extriangulated categories: Silting objects, mutation, negative extensions

M Gorsky, H Nakaoka, Y Palu - arXiv preprint arXiv:2303.07134, 2023 - arxiv.org
In this article, we initiate the study of hereditary extriangulated categories. Many important
categories arising in representation theory in connection with various theories of mutation …

[HTML][HTML] Reduction of exact structures

T Brüstle, S Hassoun, D Langford, S Roy - Journal of Pure and Applied …, 2020 - Elsevier
Examples of exact categories in representation theory are given by the category of Δ-filtered
modules over quasi-hereditary algebras, but also by various categories related to matrix …

Grothendieck groups in extriangulated categories

B Zhu, X Zhuang - Journal of Algebra, 2021 - Elsevier
Extriangulated categories were introduced by Nakaoka and Palu to give a unification of
properties in exact categories and triangulated categories. We consider in this article the …

Hereditary cotorsion pairs and silting subcategories in extriangulated categories

T Adachi, M Tsukamoto - Journal of Algebra, 2022 - Elsevier
In this paper, we study (complete) cotorsion pairs in extriangulated categories. First, we
study a relationship between an interval of the poset of cotorsion pairs and the poset of …