Characteristic polynomial
$$\begin{equation}\left(\lambda - 9\right) \left(\lambda^{2} + 9 \lambda + 27\right) \left(\lambda^{3} + 4 \lambda^{2} + 23 \lambda + 9\right) \left(\lambda^{7} + 8 \lambda^{6} + 18 \lambda^{5} - 48 \lambda^{4} - 353 \lambda^{3} - 1206 \lambda^{2} - 3274 \lambda - 5087\right)^{2}\notag\end{equation}$$
Minimal polynomial
$$\begin{equation}\left(\lambda - 9\right) \left(\lambda^{2} + 9 \lambda + 27\right) \left(\lambda^{3} + 4 \lambda^{2} + 23 \lambda + 9\right) \left(\lambda^{7} + 8 \lambda^{6} + 18 \lambda^{5} - 48 \lambda^{4} - 353 \lambda^{3} - 1206 \lambda^{2} - 3274 \lambda - 5087\right)\notag\end{equation}$$
Quantum multiplication matrix
$$\begin{equation}\begin{pmatrix}0 & 0 & 0 & 2 & 2 & 4 & 0 & 3 & 0 & 3 & 0 & 3 & 3 & 3 & 0 & 0 & 0 & 4 & 4 & 5 \\ 1 & -1 & 0 & 0 & 0 & 0 & 0 & 2 & 2 & 4 & 0 & 0 & 0 & 0 & 0 & 3 & 3 & 3 & 0 & 4 \\ 1 & 0 & -1 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 2 & 2 & 4 & 0 & 3 & 0 & 3 & 0 & 3 & 4 \\ 1 & 1 & 0 & -1 & 0 & 1 & 0 & -2 & 0 & 0 & 0 & 0 & 0 & 2 & 0 & 0 & 0 & 0 & 3 & 0 \\ 1 & 0 & 1 & 0 & -1 & 1 & 0 & 0 & 0 & 0 & 0 & -2 & 0 & 2 & 0 & 0 & 0 & 3 & 0 & 0 \\ 1 & 0 & 0 & 1 & 1 & -1 & 0 & 2 & 0 & 0 & 0 & 2 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 \\ 0 & 1 & 1 & 0 & 0 & 0 & -2 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 2 & 2 & 4 & 0 & 0 & 3 \\ 0 & 1 & 0 & 2 & 0 & 0 & 0 & -1 & 0 & 1 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 2 & 0 & 3 \\ 0 & 1 & 0 & -1 & 1 & -2 & 1 & 0 & -2 & 0 & 0 & 0 & 0 & -1 & 0 & -2 & 0 & 2 & -2 & 0 \\ 0 & 1 & 0 & 1 & 0 & 3 & 0 & 1 & 1 & -1 & 0 & 0 & 0 & 1 & 0 & 2 & 0 & 0 & 2 & 0 \\ 0 & 0 & 1 & 1 & -1 & -2 & 1 & 0 & 0 & 0 & -2 & 0 & 0 & -1 & -2 & 0 & 0 & -2 & 2 & 0 \\ 0 & 0 & 1 & 0 & 2 & 0 & 0 & 0 & 0 & 0 & 0 & -1 & 1 & 0 & 0 & 0 & 0 & 0 & 2 & 3 \\ 0 & 0 & 1 & 0 & 1 & 3 & 0 & 0 & 0 & 0 & 1 & 1 & -1 & 1 & 2 & 0 & 0 & 2 & 0 & 0 \\ 0 & 0 & 0 & 2 & 2 & 3 & 0 & 0 & 1 & 1 & 1 & 0 & 1 & 0 & 0 & 0 & 0 & 0 & 0 & 0 \\ 0 & 0 & 0 & 0 & 0 & 0 & 1 & 1 & -1 & -2 & 2 & 0 & 0 & -1 & -2 & 0 & 0 & -1 & 0 & 2 \\ 0 & 0 & 0 & 0 & 0 & 0 & 1 & 0 & 2 & 0 & -1 & 1 & -2 & -1 & 0 & -2 & 0 & 0 & -1 & 2 \\ 0 & 0 & 0 & 0 & 0 & 0 & 1 & 0 & 1 & 3 & 1 & 0 & 3 & 1 & 1 & 1 & -1 & 1 & 1 & 0 \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 2 & 2 & 3 & 0 & 0 & 0 & 3 & 1 & 0 & 1 & 0 & 0 & 0 \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 2 & 2 & 3 & 3 & 0 & 1 & 1 & 0 & 0 & 0 \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 2 & 2 & 3 & 3 & 3 & 0\end{pmatrix}\notag\end{equation}$$