Friezes of cluster algebras of geometric type

Antoine de Saint Germain, Min Huang, Jiang-Hua Lu

For a cluster algebra $\mathcal{A}$ over $\mathbb{Q}$ of geometric type, a $\text{frieze}$ of $\mathcal{A}$ is defined to be a $\mathbb{Q}$-algebra homomorphism from $\mathcal{A}…