n - :
(24.1)
:
AX=B, (24.2)
, ,
x1, x2,xn, (24.1) .
. x1, x2,xn (24.1) , . xn , xn-1 ..
.
1. n, , A B.
2. 3- 7, k 1 n-1.
3. 4- 7, i, , k+1 n.
4. c=aik/akk, aik=0.
5. 6, j c k+1 n.
6. aij=aij-c×akj.
7. bi=bi-c×bk.
8. xn=bn/ann
9. 10 13, i n-1 1.
10. s=0.
11. 12, j i+1 n.
12. s=s+aij×xj.
13. xi=(bi-s)/aii.
14. x1,x2,,xn.
2 7 A ( ), 8 13 ( ).
. A A-1, (24.2): A-1×A×X=A-1×B. : X=A-1×B. X .