61. : ,, .
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φ(x) F(x,y,y') = 0, . , (x0,y0) .
62. : ,,,, .
63.- - .. .
y1(x), y2(x),..., yn(x), [a;b], [a;b], α1, α2,..., αn, , α1y1(x) + α2y2(x) +... + αnyn(x) = 0 x [a;b].
y1(x), y2(x),..., yn(x) .
(a;b), (a;b], [a;b), .
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y1(x), y2(x),..., yn(x) [a;b] , .
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y1(x), y2(x),..., yn(x) [a;b] , .
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y1(x), y2(x),..., yn(x) , .
y1(x), y2(x),..., yk(x) , yk + 1(x), yk + 2(x),..., yn(x) y1(x), y2(x),..., yk(x), yk + 1(x),..., yn(x) .
y1(x), y2(x),..., yn(x) [a;b], , [a;b].
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y1(x), y2(x),..., yn(x) [a;b], , [;b] (, ).
W(x; y1(x), y2(x),..., yn(x)) , y1(x), y2(x),..., yn(x) Cn-1[a, b], :
.
y1(x), y2(x),..., yn(x) [a;b], : W(x; y1(x), y2(x),..., yn(x)) ≡ 0 [a;b].
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