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. ij , i , bj (i = 1,2,, n, j = 1,2,, m).
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D = |A| , D i .
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= ( 710 12) (2 42 10) = 29 + 54 = 25.
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(5)
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, .. (a1, a2, a3,, a ) .
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(5), .
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0 + 0 +1 +...+ 0 n = b, b ¹ 0,
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2 , 1:
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k k (k £ min(m, n)) , , . k - .
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3
.
rang A r (A).
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= (ij) m ´ n 0£ r (A) £ min(m, n), r (A) = 0 , ;
r (A) = , ;
r (A) = r (A);
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c 11. c 22. c 33..... ckk ¹ 0, k £ m. . k = m = , .
k -
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, r(A) r() , .. ( ).
r = .
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1. r (A) r (); r (A) ¹ r (), ;
2. r (A) = r (`) = r,
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`= Þ Þ = =`.
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`= Þ Þ = =`,
, r (A) = r = r = 2 . = 3 r < n, .
.
bi, i = 1,2,, m , . bi = 0,
(7),
.
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= r.
(r = n), (7) . (r < n), , , . .
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1) , ;
2) - .
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, r (A) = 2. , .
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1 3 : , , 2 4 .
(8)
, 2 = 1, 4 = 2, 1, 2 .
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1 2 - .
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.