1. . IX , , .
. .
60-70- . . , ,
, .
.
.
I 60- , . , -, . , .
II 80- . . , .
III 80- , , . , .
2. , , .
m n . ai>0 (i=1,,m), bj>0 (j=1,,n) cij (i=1,,m; j=1,,n).
, . . , .
, . .
,
, .
b1 | b2 | bn | ||
a1 | c11 | c12 | c1n | |
a2 | c21 | c22 | c2n | |
am | cm1 | cm2 | cmn |
xij , i- j - .
|
|
x11 x12 x1n
x21 x22 x2n
X = .
xm1 xm2 xmn
(i=1,,m) (17.1)
(j=1,,n)
(i=1,,mj=1,..,n) (17.2)
(17.3)
(17.1 17.3) . .
3