2 problems

Let $\zeta$ be a root of unity, and let $\mathbb{Z}[\zeta]$ be the ring generated by $\zeta$ over $\mathbb{Z}$. A non-zero $\mathbb{Z}[\zeta]$ frieze of Dynkin type is a frieze who…

Let $\mathcal{C}$ be a premodular category, let $X_a$ be a simple object, and let $N=\operatorname{ord}(T)$, where $T$ is the twist matrix. The dimension of $X_a$ is denoted by…