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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

Extriangulated categories were introduced by Nakaoka and Palu by extracting the similarities between exact categories and triangulated categories. In this article, we introduce and study the notion of $\xi$-tilting object in an…

Representation Theory · Mathematics 2020-12-17 Yuxia Mei , Jiaqun Wei

Herschend-Liu-Nakaoka introduced the notion of $n$-exangulated categories. It is not only a higher dimensional analogue of extriangulated categories defined by Nakaoka-Palu, but also gives a simultaneous generalization of $n$-exact…

Representation Theory · Mathematics 2020-10-23 Jiangsheng Hu , Dongdong Zhang , Panyue Zhou

A notion of mutation of subcategories in a right triangulated category is defined in this paper. When (Z,Z) is a D-mutation pair in a right triangulated category C, the quotient category Z/D carries naturally a right triangulated structure.…

Representation Theory · Mathematics 2019-02-21 Yu Liu , Bin Zhu

Herschend-Liu-Nakaoka introduced the notion of $n$-exangulated categories. It is not only a higher dimensional analogue of extriangulated categories defined by Nakaoka-Palu, but also gives a simultaneous generalization of $n$-exact…

Representation Theory · Mathematics 2021-08-25 Yu Liu , 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

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 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

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

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

Let C be triangulated category and X a cluster tilting subcategory of C. Koenig and Zhu showed that the quotient category C/X is Gorenstein of Gorenstein dimension at most one. The notion of an extriangulated category was introduced by…

Representation Theory · Mathematics 2021-08-25 Yu Liu , Panyue Zhou

We give a simultaneous generalization of exact categories and triangulated categories, which is suitable for considering cotorsion pairs, and which we call extriangulated categories. Extension-closed, full subcategories of triangulated…

Category Theory · Mathematics 2019-04-29 Hiroyuki Nakaoka , Yann Palu

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

We define mutation pair in a pseudo-triangulated category. We prove that under certain conditions, for a mutation pair in a pseudo-triangulated category, the corresponding quotient category carries a natural triangulated structure. This…

Category Theory · Mathematics 2014-01-03 Zengqiang Lin , Minxiong Wang

Extriangulated categories axiomatize extension-closed subcategories of triangulated categories. We show that the homotopy category of an exact quasi-category can be equipped with a natural extriangulated structure.

Category Theory · Mathematics 2020-04-07 Hiroyuki Nakaoka , Yann Palu

Bondal-Kapranov's notion of enhanced triangulated categories behaves well in the framework of localization theory, in the sense that the Verdier quotient of triangulated categories can be lifted to the Drinfeld dg quotient of…

Category Theory · Mathematics 2025-12-16 Nao Mochizuki , Yasuaki Ogawa

Relative theories(=closed subfunctors) are considered in exact, triangulated and extriangulated categories by Dr\"{a}xler-Reiten-Smal{\o}-Solberg-Keller, Beligiannis and Herschend-Liu-Nakaoka, respectively. We give a construction method of…

Category Theory · Mathematics 2021-11-30 Arashi Sakai

Extriangulated categories, introduced by Nakaoka and Palu, serve as a simultaneous generalization of exact and triangulated categories. In this paper, we first introduce the concept of admissible weak factorization systems and establish a…

Category Theory · Mathematics 2024-08-28 Yajun Ma , Hanyang You , Dongdong Zhang , 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
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