Rn - n - , n >1. p,p¢Î Rn : p£p¢ Û p - p¢, p¢ p, p. p¢>¾p Û p¢ p. ... Rn , n - n -.
Rn Bn. Rn - n , - n -, l (Rn)= n -1. Rn . 2 .
, = =1 n >1 = n >2, - 2- . ï R 2ï= B 2=2, h (R 2)=1; ï R 3ï= B 3=5, h (R 3)=3. n >3, > = 1< k < n -1.
n - k , , Rn , n >3 :
h (Rn)³ .
X . .
A =(X, F), X , F ={ f 1,, fm } X n 1,, nm .
@ X A, F, xi, xi ¢Î X xi @ xi ¢, i =1,, nj, j =1,, m
fj (x 1,, )@ fj (x 1¢,, ¢).
.
3.1 [7, .181]. j - A B. q , x q x ¢ Û j(x)=j(x ¢), A. w
f: X Y, X Y - n m , (f)=(X È Y, U), X È Y - , U - , (x, y)Î U Û x Î X, y = f (x)Î Y. (f) f.
g - X - (g) X (x, g (x)).
S ={ g 1,, gm } - - X. S - (S)=(g 1)ÈÈ(gm), (x, y) { i 1,, is } {1,, m } : gj (x)= y j Î{ i 1,, is }. (S) - , s (x, y) i 1,, is .
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l ³1 { x 1,, xl } X , g (xl)= x 1 g (xi)= xi +1, i =1,, l -1, l (g). X, { x, g (x), g 2(x),} x Î X. g (g).
, , . g (g) , r : 1£ r £ n; g , r < n. (g), . , (g) .
(g) .
(g) g k , 1£ k £ n, , [18, .1, .XI, 8]. gt t g.
n - (..), n.
3.11. .. n - (n -1)!.
t n - X , n . , !. ( .. ) Û . , .. - ( -1)!. u