8-10 8, 9k-1,m 8k-2.0 8k 8k-2,n 81.081,1…g1n-1 80.0s0.1 g0.n-1⊥kxn 01·0 kikx 00…1 Pk1∵Pk k k 01…0 k h,1…btk00k n n n k k k n k k k n k k g g g g g g g g g g g g g g g g G  − − − − − − − − − − − −                 =                 = 0,0 0,1 0, 1 1,0 1,1 1, 1 2,0 2,1 2, 1 1,0 1,1 1, 1 0 1 2 1                k k r k k r r r I P p p p p p p G =              =         1 2 1 2 1 1 1 0 00 1 01 0 10 0   r k r r rk k k Q I h h h h h h H =              = 00 1 01 0 10 0 1 2 1 2 1 1 1 0        