On the Casimir number and formal codegree of Haagerup-Izumi fusion rings

Ying Zheng, Jiacheng Bao, Zhiqiang Yu

For any cyclic group ${\mathbb{Z}}_n$, we first determine the Casimir number and determinant of the Haagerup-Izumi fusion ring ${\mathcal{H}\mathcal{I}}_{{\mathbb{Z}}_n}$, it turns out that they d…