. , . . () . .
{ 1, 2,..., xn }, . i ={0,1}, . , i, :
i =2 n -1 x 1+2 n -2 x 2++ xn.
i ( 1, 2,..., xn):
i .
() , , , ( ).
: 7=1234; 2=12.
() , , , ( ). :
F 1=1234; F 0=123.
r , . , F 10= 12345 r = 5, 2=1+2+3 r = 3.
.
1.1. :
f (x 1, x 2 xn)= F 1 F 2 Fn = Fi,
i , 1; , Fi, . , i, fi =1, Fi =1, i, fi =0, fi =1. , .
() , .
, , .
. , 1.9.
1.9
. :
f (1,2,3)= F (0,0,0)+ F (0,1,1)+ F (1,0,0)=123+123+123.
: f (1,2,3)= 123+123+123.
, ( +). . .
1: - Fi =1, f .
|
|
2: - Fi =0, f .
, Fi = 0 f .
1.9 1.10.
1.10 1.11
, , , , 1.1:
: :
f (x 1, x 2 xn) = F 1 f 2 fk,
, .
1 2 , - .
3: - i = 0, f .
4: i = 0, f =1.
, , (. 1.12 1.13).
1.12
1.13
1.2. :
f (x 1, x 2 xn)=1&2&& k,
k , =0.
() , .
. :
f (x 1, x 2 xn)=12 k,
k .