, , . , , , , , .
-, , . , , , , .
-, ; , .
-, , , .
, -, . , (, ) : , .
:
.
.
() , . . . 1 m , i = , 2 n , j = . 1 2
= , =
- x = (x1,..., xm) 1 1, = (y1,..., yn) 2. 1 2
(x,y) 1 2, :
(1) (2) ( ) x = (x1,..., xm) = (y1,..., yn)
, , xi ³ 0 (i = ), yj ³ 0 (j = ).
(). .
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, . A B :
A = , B = .
1 2 :
(x, 1 x), (y, 1 y) 0 £ x £ 1; 0 £ y £ 1,
:
E1 (A,x,y) = xA = (x; 1- x) =
= (a11 a12 a21 + a22) xy + (a12 - a22) x + (a21 - a22) y + a22.
E2 (B,x,y) = xB = (x; 1- x) =
= (b11 - b12 - b21 + b22) xy + (b12 - b22) x + (b21 - b22) y + b22.
£ E1 (A,x,y),
(x; 1- x) £ E2 (B,x,y),
(3) (4),
(1- x) y + (1- x) £ 0
(a11 - a12 - a21 + a22) xy + (a12 - a22) x ³ 0
. ., 1 (5) (6), 0 £ x £ 1; 0 £ y £ 1. x 3 :
1. x = 0, (6) " y, (5) :
a1y - a2 £ 0.
2. x = 1, (5) " y, (6) :
a1y - a2 ³ 0.
3. 0 < x < 1, (5) (1 - x), (6) x
, (5) (6)
1) (0; y), a1y - a2 £ 0; 0 £ y £ 1;
2) (x; y), a1y - a2 = 0; 0 < x < 1;
3) (1; y), a1y - a2 ³ 0; 0 £ y £ 1.
a1 = a2 = 0, x Î[0; 1], y Î[0; 1], . . (7) (8) x y, . . 1 .
a1 = 0, a2 ¹ 0, (7), (8), x = 0, x =1 0 £ y £ 1 ( ).
a1 > 0, (7)
x = 0; y £ := a,
(8) x = 1, y ³ a, (9)
0 < x < 1, y = a.
a1 < 0, :
x = 0, y ³ a; x = 1, y £ a; 0 < x < 1, y = a.
,
0 £ y £ 1.
:
y ¥ y ¥ y ¥
1 1 1
a1 >0 a1 >0 a1 >0
a<0 a=0 1< a<1
(x, a)
0 1 x 0 1 x 0 1 x
¥ ¥ ¥
y ¥ y y
¥ ¥
1 a1>0 1 a1>0 1 a1< 0
(x, 1) a=1 a >1 (x, a) 0< a<1
(0, b)
x x x
0 ¥ 1 0 ¥ 1 0 ¥ 1
2 .
b1:= b11 - b12 - b21 + b22
b2:= b22 -
L :
1) (x, 0), b1x - b2 < 0; 0 £ x £ 1,
2) (x, y), b1x - b2 = 0; 0 £ x £ 1; 0 < y < 1,
3) (x, 1), b1x - b2 > 0; 0 £ x £ 1.
:
b1 = b2 = 0, 0 £ x £ 1; 0 £ y £ 1;
b1 = 0; b2 ¹ 0, y = 0, y = 1 0 £ x £ 1 ( );
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b1 > 0, :
y = 0, x < = b; y = 1, x > b; 0 < y < 1; x = b;
b1 < 0, :
y = 0, x > b; y = 1, x < b; 0 < y < 1; x = b
, 0 £ x £ 1.
y y
1 1
(b,y) (b,y)
x x
0 1 0 1
b1 > 0 b1 < 0
0 < b < 1 0 < b < 1
K L, .. x y, K L.
y y
1 1
x x
0 1 0 1
) )
K L , . , - . (*), x y (.)). a 2, 1 ; b 1, 2. , a 1 A, b 2 B. , , .
, , , .. 1 1 A, 2 2 B, 2, .. , 1, .
1. . . 1 : 1, 2. 2 : . () , () :
A = , B =
(: , 1 , , 5 , 10 , ..)
. :
a1 = a11 - a12 - a21 + a22 = -10 - 2 - 1 - 1 = -14 < 0,
a2 = a22 - a12 = -1 - 2 = -3,
.
a1 < 0, K :
(0, y) ;
(x, ) 0 £ x £ 1;
(1, y) 0 £ y £ .
2 :
b1 = b11 - b12 - b21 + b22 = 5 + 2 + 1 + 1 = 9 > 0,
b2 = b22 - b21 = 1 + 1 = 2,
.
y
b1 > 0, L L
:
K
(x; 0), 0 £ x £ ;
(; y), 0 £ y £ 1; 0 1 x
(x; 1), £ x £ 1.
L K C x = ; y = .
E1 (A,x,y) = (x, 1- x) =
= =
E2 (A,x,y) = (x, 1- x) =
. , A 1
1 , , E1, 2 ; B 2 :
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, 2 , 1 , , E2.
, , , .