j - , a, b
(a j, b) = (a, b j) (1)
.
, , . , a, j = a . ,
(a j, b) = (a a, b) = a (a, b) = (a, a b) = (a, b j)
. . , , .
j 1, 2,, = (a ij). , ,
, (1), a ij = a ji i j. , , .
j 1, 2,, = (a ij), a ij = a ji i j. ,
,
,
,
a ij = a ji i j, , (b j, c) = (b, c j), .
:
, .
. .
- , , :
.
. l0 , , = (a ij), , ç l0 ç = 0.
, b1,b2,,b , , . ,
(3)
i- (3) , b i, ,
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, (4)
l0 (4) , , . l0 , (4), , . .
: i j, j i. .
j , , .
. 1, 2,, , i j = l i i, i = 1,2,, n, j . , j , .
. = 1 j 1 , . , j, , 1 . , 1.
( 1)- j. j l0. , , - j. j, , , - , j , l0, (a ) j = a ( j) = a (l0 ) = l0(a ). , , i, 1 j = l0 1, 1j = l0 1, ( 1, 1) = 1. 1
1, ¢2,, ¢ (5)
. , (5) , a2 2¢ + + a ¢ , , , ( 1)- , L. ( 1)- , , , L, .
L , 1. , = a1 1 + a2 2¢ + + a ¢ , (5) 1,
( 1, ) = a1( 1, 1) +a2¢( 1, 2¢) + + a ¢( 1, ¢) = a1,
( 1, ) = 0 , a1 = 0. L, ( 1, ) = 0, j L. , j,
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( 1, j) = ( 1 j, ) = (l0 1, ) = l0 ( 1, ) = l00 = 0,
j 1 L. L, j, j, L, ( 1)- . L, (1) , , , , L.
L , j; 2,, . 1, 1, 2,, , j. .