Characteristic polynomial
$$\begin{equation}\left(\lambda + 3\right)^{2} \left(\lambda - 1\right) \left(\lambda^{11} + 8 \lambda^{10} - 40 \lambda^{9} - 1099 \lambda^{8} - 7946 \lambda^{7} - 36743 \lambda^{6} - 137790 \lambda^{5} - 424542 \lambda^{4} - 885120 \lambda^{3} - 1058775 \lambda^{2} - 656451 \lambda - 142559\right)\notag\end{equation}$$
Minimal polynomial
$$\begin{equation}\left(\lambda + 3\right) \left(\lambda - 1\right) \left(\lambda^{11} + 8 \lambda^{10} - 40 \lambda^{9} - 1099 \lambda^{8} - 7946 \lambda^{7} - 36743 \lambda^{6} - 137790 \lambda^{5} - 424542 \lambda^{4} - 885120 \lambda^{3} - 1058775 \lambda^{2} - 656451 \lambda - 142559\right)\notag\end{equation}$$
Quantum multiplication matrix
$$\begin{equation}\begin{pmatrix}0 & 2 & 4 & 6 & 12 & 12 & 6 & 18 & 12 & 9 & 32 & 24 & 12 & 30 \\ 1 & -1 & 0 & 1 & 4 & 4 & 0 & 8 & 4 & 4 & 6 & 6 & 3 & 0 \\ 1 & 0 & -1 & 1 & 2 & 4 & 2 & 6 & 4 & 4 & 12 & 12 & 3 & 8 \\ 1 & 1 & 2 & -1 & 0 & 0 & 0 & 0 & 0 & 0 & 12 & 6 & 6 & 8 \\ 0 & 1 & 1 & 0 & -2 & 1 & 0 & 1 & 0 & 1 & 4 & 4 & 2 & 0 \\ 0 & 1 & 0 & 2 & 2 & -1 & 0 & 2 & 2 & 0 & 0 & 0 & 0 & 0 \\ 0 & 1 & 0 & -1 & 0 & 0 & -1 & -2 & -2 & 0 & 8 & 4 & 4 & 6 \\ 0 & 0 & 1 & 1 & 1 & 0 & 0 & -2 & 0 & -1 & 0 & 0 & 0 & 6 \\ 0 & 0 & 1 & 0 & 0 & 0 & 0 & 1 & -1 & 1 & 4 & 2 & 2 & 0 \\ 0 & 0 & 0 & 1 & 0 & 1 & 1 & 2 & 2 & 0 & 0 & 0 & 0 & 0 \\ 0 & 0 & 0 & 0 & 3 & 4 & \frac{7}{2} & -4 & -5 & -1 & 0 & 0 & 1 & 4 \\ 0 & 0 & 0 & 0 & 0 & -2 & -2 & 5 & 6 & 1 & 0 & -1 & 0 & 0 \\ 0 & 0 & 0 & 0 & -2 & -1 & -3 & 8 & 6 & 4 & 2 & 4 & -2 & -4 \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 5 & 4 & 2 & 0\end{pmatrix}\notag\end{equation}$$