, : -, -.
. :
f(bd)= = = -.
-.
. 63.
. 63. f(bd)=
2- () 2- (),
.. -, -
, :
.. -.
.
{Å,,} ( ). 2 1.
.
:
Úy= =(Å1)(yÅ1)Å1=
=xyÅxÅyÅ1Å1=xyÅxÅy.
(1Å1=0).
. xÚyÚz.
xÚyÚz= =(Å1)(yÅ1)(zÅ1)Å1=(xyÅxÅyÅ1)(zÅ1)Å1=
=xyzÅxzÅyzÅxyÅxÅyÅ1Å1=xyzÅxzÅyzÅxyÅxÅy.
( Å=0).
2 xi (xjÅ1) .
, f, . 54.
54
x | y | z | f |
0 | 0 | 0 | 0 |
0 | 0 | 1 | 1 |
0 | 1 | 0 | 1 |
0 | 1 | 1 | 0 |
1 | 0 | 0 | 1 |
1 | 0 | 1 | 0 |
1 | 1 | 0 | 0 |
1 | 1 | 1 | 1 |
:
f=(xÅ1)(yÅ1)zÅ(xÅ1)y(zÅ1)Åx(yÅ1)(zÅ1)Åxyz=
=(xyÅxÅyÅ1)zÅ(xzÅxÅzÅ1)yÅx(yzÅyÅzÅ1)Åxyz=
=xÅyÅz,
, 2 .
f xi [9]:
=f(1,2,...,i-1,1,xi+1,...,xn)Åf(x1,x2,...,xi-1,0,xi+1,...,xn),
f(1,2,...,i-1,1,xi+1,...,xn) , i 1, f(1,2,...,i-1,0,xi+1,...,xn) , xi 0.
|
|
. f=1Ú2.
.
.
xi=0, f xi, xi=1, f xi.
, xi .
f(123) 1, 23, .. 2=1, 3=1.
.
, ( ) 1, 2=1 3=0 ; 2, 1=3=1 (13=1); 3, 1=1; 2=0 .
k- k , [9]:
k- 2 , , ,..., k- , , , :
, f 1, 2, 3=0, 3 1 2 1,1 0,0 0,0 1,1.
[9]. . , , , .