反対角行列
( 0 0 0 0 1 0 0 0 7 0 0 0 − 2 0 0 0 6 0 0 0 8 0 0 0 0 ) {\displaystyle {\begin{pmatrix}0&0&0&0&1\\0&0&0&7&0\\0&0&-2&0&0\\0&6&0&0&0\\8&0&0&0&0\\\end{pmatrix}}}