Computing singularities of the spectra of representation rings of finite groups

André Gimenez Bueno, Renato Vidal Martins, Edney Oliveira +1

Let $G$ be a finite group of order $n$, and $\xi$ an $n$-th primitive root of unity. Consider the affine scheme $C:=\mbox{Spc}({\mathbb Z}[ξ]\otimes_{\mathbb Z} R(G))$ where $R(G)$ i…