消去过程算法 au m b b 0 b n k+1) k (k ak( aik/akk b=b-b(a从a)k+1≤≤n 0k+1<i i k=1,2消去过程算法 (1) (1) (1) 11 1 1 ( ) ( ) ( ) ( ) 1 n k k k k kk kk kn k a a b a a a b + ( 1) ( 1) 0 0 k 1 i,j n k k a b ij j + + +   ( ) k ≤ i,j n ( ) b b b a a a a a a a (k) kk (k) i k (k) k (k) i ( k ) i (k) kk (k) i k (k) kj (k) i j ( k ) i j = − +  = − + + 1 1 1 ( ) 0 k 1 i n k aik = +   k =1, 2,  , n −1