1. .
2. .
3. .
4. .
5. . .
6. . . .
1. f(X)=5x12+5x22+6x1x2 X0=(2;4)T.
2. f(X)=5x12+5x22-6x1x2 X0=(-4;3).
3. f(X)=5x12+5x22+8x1x2 X0=(3;5)T.
4. f(X)=5x12+5x22-8x1x2 X0=(-3;4)T.
5. f(X)=2x12+x22-x1x2 X0=(-1;2)T.
6. f(X)=2x12+2x22+2x1x2-14x1-12x2+29 X0=(-1;4)T.
7. f(X)=2x12+2x22-2x1x2-4x1-2x2+5 X0=(-1;3)T.
8. f(X)=100(x2-x12)2+(1- x1) 2 X0=(-1;0)T.
(2.1) , f(X) En.
Xk+1= Xk+ akSk, k=0,1,2,..., (2.21) f(X), .. kÎEn, f*.
, Sk ak, (2.21) , f(X) {Xk}, , , .
, f(X) X f(X),
(X)= ,
, . , .
{Xk} (2.21), Sk , f(X) Xk. , :
|
|
Xk+1= xk- ak (X k), k=0,1,2, (2.22)
,
f(Xk+1) < f(Xk), k=0,1,2,... (2.23)
| f(Xk+1) - f(Xk) | £ e1, (2.24)
|| Xk+1 - Xk || £ e2, (2.25)
|| (Xk) || £ e3, (2.26)
ei - .
.
0. e>0, a>0, lÎ(0;1), X0ÎEn, f(X0), k=0.
1. (Xk) || (Xk) || £ e. , 4, - 2.
2. X= Xk- a (Xk) f(X). f(X) < f(Xk), Xk+1=Xk, f(Xk+1)=f(Xk), k=k+1, 1, - 3.
3. a=al, 0<l<1 2.
4. , X*= Xk, f *= f(Xk).