则+y=∑(b+c)G,kB=∑kb) 于是G(升+y)=∑b+ca=∑b+∑ca i=1 o(B)+o(r a(k)=∑ b)a=k∑ba1=ko(B) i=1 i=1 σ为V的线性变换 又6;=0E1+…+06;1+6;+0E++…+0En o8 n5 则 1 1 , ) n n i i i i i i i b c k b = = + = ( + ) = (k 于是 ( ) 1 1 1 n n n i i i i i i i i i i b c b c = = = + = = + ( + ) = + ( ) ( ) ( ) ( ) 1 1 ) n n i i i i i i k kb k b k = = = = = ( 为V的线性变换. 又 1 1 1 0 0 0 0 i i i i n = + + + + + + − + ( ) , 1,2, , i i = = i n