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Extriangulated categories were introduced by Nakaoka and Palu as a simultaneous generalization of exact categories and triangulated categories. In this paper, we show that the idempotent completion of an extriangulated category admits a…

Category Theory · Mathematics 2020-07-10 Li Wang , Jiaqun Wei , Haicheng Zhang , Tiwei Zhao

The extriangulated category is a simultaneous generalization of exact categories and triangulated categories. H. Nakaoka and Y. Palu have proved that the homotopy category of an admissible model structure on a weakly idempotent complete…

Representation Theory · Mathematics 2026-01-13 Shun-Jie Li , Yang Gao , Pu Zhang

In this paper the concept of compatible weak factorization systems in general categories is introduced as a counterpart of compatible complete cotorsion pairs in abelian categories. We describe a method to construct model structures on…

Category Theory · Mathematics 2024-10-02 Zhenxing Di , Liping Li , Li Liang

Extriangulated categories were introduced by Nakaoka and Palu as a simultaneous generalization of exact categories and triangulated categories. In this paper, we first introduce the concept of left Frobenius pairs on an extriangulated…

Category Theory · Mathematics 2021-08-31 Yajun Ma , Haiyu Liu , Yuxian Geng

Extriangulated categories were introduced by Nakaoka and Palu by extracting the similarities between exact categories and triangulated categories. A notion of mutation of subcategories in an extriangulated category is defined in this…

Representation Theory · Mathematics 2016-08-03 Panyue Zhou , Bin Zhu

We introduce extriangulated factorization systems in extriangulated categories and show that there exists a bijection between $s$-torsion pairs and extriangulated factorization systems. We also consider the gluing of $s$-torsion pairs and…

Category Theory · Mathematics 2025-07-08 Yan Xu , Haicheng Zhang , Zhiwei Zhu

Motivated by its links to $\tau$-tilting theory, we introduce a generalization of cotorsion pairs in module categories. Such pairs are also linked to co-t-structures in corresponding triangulated categories, and to cotorsion pairs in…

Representation Theory · Mathematics 2021-11-23 Aslak Bakke Buan , Yu Zhou

Extriangulated categories were introduced by Nakaoka and Palu to give a unification of properties in exact categories and extension-closed subcategories of triangulated categories. A notion of tilting pairs in an extriangulated category is…

Category Theory · Mathematics 2023-06-22 Tiwei Zhao , Bin Zhu , Xiao Zhuang

Let $\mathcal C$ be a $(d+2)$-angulated category. In this paper, we define the notions of cotorsion pairs and weak cotorsion pairs in $\mathcal C$, which are generalizations of the classical cotorsion pairs in triangulated categories. As an…

Representation Theory · Mathematics 2024-11-28 Huimin Chang , Panyue Zhou

Hovey's correspondence between model structures and cotorsion pairs in the setting of abelian categories, has been generalized by Nakaoka-Palu, using two cotorsion pairs, to the setting of weakly idempotent complete extriangulated…

Representation Theory · Mathematics 2026-03-10 Jiangsheng Hu , Dongdong Zhang , Pu Zhang , Panyue Zhou

Recently, Nakaoka and Palu introduced a notion of extriangulated categories. This is a unification of exact categories and triangulated categories. In this paper, we generalize the definitions of Hall algebras of exact categories and…

Representation Theory · Mathematics 2021-08-04 Li Wang , Jiaqun Wei , Haicheng Zhang

In this article, we introduce the notion of $n$-cotorsion pairs in extriangulated categories, which extends both the cotorsion pairs established by Nakaoka and Palu and the $n$-cotorsion pairs in triangulated categories developed by Chang…

Representation Theory · Mathematics 2025-06-23 Huimin Chang , Yu Liu , Panyue Zhou

Extriangulated categories were introduced by Nakaoka and Palu as a simultaneous generalization of exact categories and triangulated categories. In this paper, we introduce and develop an analogous theory of Auslander-Buchweitz…

Category Theory · Mathematics 2020-07-15 Yajun Ma , Nanqing Ding , Yafeng Zhang

Nakaoka and Palu introduced the notion of extriangulated categories by extracting the similarities between exact categories and triangulated categories. In this paper, we study cotorsion pairs in a Frobenius extriangulated category $\C$.…

Representation Theory · Mathematics 2018-07-20 Wen Chang , Panyue Zhou , Bin Zhu

The notion of extriangulated category was introduced by Nakaoka and Palu giving a simultaneous generalization of exact categories and triangulated categories. Our first aim is to provide an extension to extriangulated categories of…

Representation Theory · Mathematics 2025-05-22 Yasuaki Ogawa

Extriangulated category was introduced by Nakaoka and Palu to give a unification of properties in exact categories and triangulated categories. A notion of tilting (or cotilting) subcategories in an extriangulated category is defined in…

Representation Theory · Mathematics 2019-07-02 Bin Zhu , Xiao Zhuang

Herschend-Liu-Nakaoka introduced the concept of $n$-exangulated categories as higher-dimensional analogues of extriangulated categories defined by Nakaoka-Palu. The class of $n$-exangulated categories contains $n$-exact categories and…

Representation Theory · Mathematics 2024-01-02 Jian He , Jing He , Panyue Zhou

Extriangulated categories were introduced by Nakaoka and Palu as a simultaneous generalization of exact categories and triangulated categories. A notion of proper class in an extriangulated category is defined in this paper. Let…

Representation Theory · Mathematics 2020-01-30 Jiangsheng Hu , Dongdong Zhang , Panyue Zhou

Using full images of accessible functors, we prove some results about combinatorial and accessible model categories. In particular, we give an example of a weak factorization system on a locally presentable category which is not accessible.

Category Theory · Mathematics 2022-02-08 Jiří Rosický

A notion of balanced pairs in an extriangulated category with a negative first extension is defined in this article. We prove that there exists a bijective correspondence between balanced pairs and proper classes $\xi$ with enough…

Representation Theory · Mathematics 2021-09-06 Jian He , Panyue Zhou
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