Geodesic
Hall algebras of two equivalent extriangulated categories
Czechoslovak Mathematical Journal, Tome 74 (2024) no. 1, pp. 95-113 Cet article a éte moissonné depuis la source Czech Digital Mathematics Library

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For any positive integer $n$, let $A_n$ be a linearly oriented quiver of type $A$ with $n$ vertices. It is well-known that the quotient of an exact category by projective-injectives is an extriangulated category. We show that there exists an extriangulated equivalence between the extriangulated categories $\mathcal {M}_{n+1}$ and $\mathcal {F}_n$, where $\mathcal {M}_{n+1}$ and $\mathcal {F}_n$ are the two extriangulated categories corresponding to the representation category of $A_{n+1}$ and the morphism category of projective representations of $A_n$, respectively. As a by-product, the Hall algebras of $\mathcal {M}_{n+1}$ and $\mathcal {F}_n$ are isomorphic. As an application, we use the Hall algebra of $\mathcal {M}_{2n+1}$ to relate with the quantum cluster algebras of type $A_{2n}$.
For any positive integer $n$, let $A_n$ be a linearly oriented quiver of type $A$ with $n$ vertices. It is well-known that the quotient of an exact category by projective-injectives is an extriangulated category. We show that there exists an extriangulated equivalence between the extriangulated categories $\mathcal {M}_{n+1}$ and $\mathcal {F}_n$, where $\mathcal {M}_{n+1}$ and $\mathcal {F}_n$ are the two extriangulated categories corresponding to the representation category of $A_{n+1}$ and the morphism category of projective representations of $A_n$, respectively. As a by-product, the Hall algebras of $\mathcal {M}_{n+1}$ and $\mathcal {F}_n$ are isomorphic. As an application, we use the Hall algebra of $\mathcal {M}_{2n+1}$ to relate with the quantum cluster algebras of type $A_{2n}$.
DOI : 10.21136/CMJ.2023.0344-22
Classification : 17B37, 18E05, 18E10
Keywords: extriangulated category; extriangulated equivalence; Hall algebra; quantum cluster algebra 
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Ruan, Shiquan; Wang, Li; Zhang, Haicheng. Hall algebras of two equivalent extriangulated categories. Czechoslovak Mathematical Journal, Tome 74 (2024) no. 1, pp. 95-113. doi: 10.21136/CMJ.2023.0344-22

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