[i−i2i−i]\left[\begin{array}{cc}i & -i \\2 i & -i\end{array}\right][i2i−i−i]
[−i2ii−i]\left[\begin{array}{cc}-i & 2 i \\i & -i\end{array}\right][−ii2i−i]
[i2iii]\left[\begin{array}{cc}i & 2 i \\i & i\end{array}\right][ii2ii]
[i−i−2ii]\left[\begin{array}{cc}\mathrm{i} & -\mathrm{i} \\-2 \mathrm{i} & \mathrm{i}\end{array}\right][i−2i−ii]