特征值

正交矩阵

对角化矩阵

[0, 0, 9]

[[−0.0778, 0.9396, 0.3333]

[−0.7241, 0.1766, −0.6667]

[−0.6853, −0.2932, 0.6667]]

[[0, 0, 0]

[0, 0, 0]

[0, 0, 9]]