Characteristic polynomial
$$\begin{equation}\left(\lambda + 1\right)^{3} \left(\lambda - 3\right) \left(\lambda^{2} + 3 \lambda + 9\right) \left(\lambda^{2} + 11 \lambda + 37\right) \left(\lambda^{2} - 9 \lambda - 11\right) \left(\lambda^{3} + 4 \lambda^{2} + 36 \lambda + 101\right)\notag\end{equation}$$
Minimal polynomial
$$\begin{equation}\left(\lambda + 1\right) \left(\lambda - 3\right) \left(\lambda^{2} + 3 \lambda + 9\right) \left(\lambda^{2} + 11 \lambda + 37\right) \left(\lambda^{2} - 9 \lambda - 11\right) \left(\lambda^{3} + 4 \lambda^{2} + 36 \lambda + 101\right)\notag\end{equation}$$
Quantum multiplication matrix
$$\begin{equation}\begin{pmatrix}0 & 2 & 4 & 2 & 9 & 9 & 3 & 0 & 9 & 12 & 32 & 20 & 20 \\ 1 & -1 & 1 & 0 & 2 & 2 & 0 & 0 & 4 & 0 & 6 & 3 & 8 \\ 1 & 1 & -1 & 0 & 0 & 0 & 0 & 2 & 2 & 9 & 18 & 12 & 8 \\ 1 & 1 & 1 & 0 & 6 & 2 & 4 & 0 & 0 & -9 & -12 & -9 & 0 \\ 0 & 1 & 1 & 0 & -2 & 0 & 0 & 0 & 0 & 2 & 2 & 0 & 6 \\ 0 & 1 & 0 & 1 & 1 & -1 & 0 & 1 & 1 & -2 & -2 & 0 & -6 \\ 0 & 1 & 0 & 0 & 1 & 0 & -1 & 0 & 0 & 0 & 4 & 2 & 0 \\ 0 & 0 & 1 & -1 & 1 & -1 & 1 & -1 & -1 & -4 & -6 & -6 & 6 \\ 0 & 0 & 2 & 2 & 2 & 2 & 1 & 0 & 0 & 4 & 6 & 6 & 0 \\ 0 & 0 & 0 & 0 & 1 & -\frac{6}{5} & 0 & \frac{19}{5} & 3 & \frac{3}{5} & \frac{9}{5} & \frac{18}{5} & -\frac{8}{5} \\ 0 & 0 & 0 & 0 & 2 & \frac{11}{5} & 0 & \frac{6}{5} & 4 & \frac{7}{5} & \frac{11}{5} & \frac{12}{5} & \frac{8}{5} \\ 0 & 0 & 0 & 0 & 1 & \frac{3}{5} & 2 & -\frac{12}{5} & -4 & -\frac{9}{5} & -\frac{17}{5} & -\frac{24}{5} & \frac{4}{5} \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & \frac{5}{2} & \frac{11}{2} & 4 & 0\end{pmatrix}\notag\end{equation}$$