Hovey triples arising from two cotorsion pairs of extriangulated categories

Panyue Zhou Colloquium Mathematicum MSC: Primary 18G80; Secondary 18E10. DOI: 10.4064/cm8615-3-2022 Published online: 24 August 2022


Assume that $(\mathcal C, \mathbb E, \mathfrak s)$ is an extriangulated category satisfying Condition (WIC). Let $(\mathcal Q, \widetilde {\mathcal R})$ and $(\widetilde {\mathcal Q}, \mathcal R)$ be two hereditary cotorsion pairs with $\widetilde {\mathcal R} \subseteq \mathcal R$, $\widetilde {\mathcal Q}\subseteq \mathcal Q$ and $\widetilde {\mathcal Q}\cap \mathcal R = \mathcal Q \cap \widetilde R$. Then there exists a unique thick class $\mathcal W$ for which $(\mathcal Q,\mathcal W,\mathcal R)$ is a Hovey triple. This result generalizes the work by Gillespie in an exact case. Moreover, it highlights new phenomena when applied to triangulated categories.


  • Panyue ZhouSchool of Mathematics and Statistics
    Changsha University of Science and Technology
    410114 Changsha, Hunan, People’s Republic of China

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