Characteristic polynomial
$$\begin{equation}\left(\lambda + 1\right) \left(\lambda^{2} + 2 \lambda + 5\right) \left(\lambda^{4} + 5 \lambda^{3} + 17 \lambda^{2} + 59 \lambda + 89\right)^{2} \left(\lambda^{7} + 6 \lambda^{6} - 54 \lambda^{5} - 864 \lambda^{4} - 3539 \lambda^{3} + 1906 \lambda^{2} + 41736 \lambda + 66104\right)\notag\end{equation}$$
Minimal polynomial
$$\begin{equation}\left(\lambda + 1\right) \left(\lambda^{2} + 2 \lambda + 5\right) \left(\lambda^{4} + 5 \lambda^{3} + 17 \lambda^{2} + 59 \lambda + 89\right) \left(\lambda^{7} + 6 \lambda^{6} - 54 \lambda^{5} - 864 \lambda^{4} - 3539 \lambda^{3} + 1906 \lambda^{2} + 41736 \lambda + 66104\right)\notag\end{equation}$$
Quantum multiplication matrix
$$\begin{equation}\begin{pmatrix}0 & 0 & 2 & 4 & 2 & 3 & 6 & 3 & 3 & 6 & 6 & 9 & 9 & 4 & 8 & 4 & 8 & 10 \\ 1 & -1 & 0 & 0 & 0 & 2 & 4 & 2 & 0 & 0 & 2 & 2 & 4 & 3 & 6 & 3 & 3 & 4 \\ 1 & 0 & -1 & 1 & 0 & 0 & 2 & 0 & 2 & 2 & 0 & 4 & 4 & 3 & 3 & 0 & 0 & 0 \\ 1 & 1 & 1 & -1 & 1 & 0 & -2 & 0 & 0 & 0 & 0 & 0 & -2 & 0 & 0 & 0 & 3 & 4 \\ 1 & 0 & 0 & 1 & -1 & 0 & 2 & 0 & 2 & 2 & 2 & 2 & 4 & 3 & 3 & 3 & 3 & 0 \\ 0 & 1 & 1 & 0 & 0 & -2 & 1 & 0 & 0 & 0 & 0 & 0 & 1 & 2 & 2 & 0 & 0 & 0 \\ 0 & 1 & 0 & 1 & 0 & 1 & -2 & 1 & 0 & 0 & 0 & 0 & -1 & 0 & 0 & 0 & 0 & 3 \\ 0 & 1 & 0 & 0 & 1 & 0 & 1 & -2 & 0 & 0 & 0 & 0 & 1 & 2 & 2 & 2 & 2 & 0 \\ 0 & 0 & 1 & 2 & -1 & 1 & 1 & 0 & -1 & 1 & 0 & 0 & -1 & -2 & 0 & 0 & -2 & -3 \\ 0 & 0 & 1 & 0 & 1 & 0 & 0 & 0 & 1 & -2 & 0 & 1 & 1 & 2 & 0 & 0 & 0 & 0 \\ 0 & 0 & 2 & 1 & 0 & 1 & 0 & 0 & 0 & 1 & -1 & 0 & 0 & 0 & 0 & 0 & 2 & 3 \\ 0 & 0 & 0 & 1 & 2 & 0 & 0 & 1 & 0 & 1 & 0 & -1 & 0 & 0 & 0 & 0 & 2 & 3 \\ 0 & 0 & 0 & 1 & 0 & 0 & 1 & 0 & 0 & 0 & 1 & 1 & 0 & 0 & 0 & 0 & 0 & 0 \\ 0 & 0 & 0 & 0 & 0 & 1 & 4 & 1 & 2 & 0 & 0 & 2 & 4 & -1 & 2 & 1 & 1 & 0 \\ 0 & 0 & 0 & 0 & 0 & 1 & 1 & 3 & 1 & 3 & 0 & 4 & 0 & 1 & -1 & 0 & 0 & 2 \\ 0 & 0 & 0 & 0 & 0 & 2 & 0 & -2 & -3 & -4 & 1 & -8 & -3 & -1 & -2 & -2 & -1 & 0 \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 3 & 4 & 2 & 5 & 3 & 1 & 2 & 1 & 0 & 0 \\ 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 3 & 4 & 2 & 3 & 0\end{pmatrix}\notag\end{equation}$$