Va∈Vn,设a=∑x;a;,有 T T ∑: ∑ rila l: 1 1 T(aD, T(a2),,,,T(am) (x0….42x410)= 上,设 ,有 1    i n i  V n =  xi = T() ( ) 1  i n i = T  xi = =  = n i xiT i 1 ( )               = x x x T T T n n   2 1 1 2 ( ( ), ( ), , ( )) ( , , , ) , 2 1 1 2               = x x x A n n     