证:Ax=x(x=(x1,x2,…,xn)≠0) Ax;(i=1,2,…,n)xk=max(x1b,…,xnD>0 j=1 ∑x;=x→xk(-ak)=∑ k xk-ak=∑;∑lx1x∑q ≠k j≠k ≠k Ih-akkISRk返回 1 2 ( ( , , , ) 0) T 证： Ax x x x x x = =   n 1 ( 1,2, , ) n ij j i j a x x i n  =  = = 1 | | max(| |, ,| |) 0 x x x k n =  1 n kj j k j a x x  =  = ( ) k kk kj j j k x a a x   − =  | || | | | k kk kj j j k x a a x   − =  | || | kj j j k a x    | | | | k kj j k x a    | | kk k  −  a R