所用变换矩阵为 110101 C= =1-10012 00100 113 =1-1-1(C=-2≠0) 001所用变换矩阵为                     = − 0 0 1 0 1 2 1 0 1 0 0 1 1 1 0 1 1 0 C . 0 0 1 1 1 1 1 1 3           = − − (C = −2  0)