Information Technology Reference
In-Depth Information
a.
ADF
0
ADF
1
Cell
c
A
A
O
N
O
N
a
ADF
0
ADF
1
b
A
A
a
ADF
0
ADF
1
b
b.
ADF
0
ADF
1
Cell
O
O
O
c
b
N
A
A
N
a
ADF
0
ADF
1
O
A
O
a
c
ADF
0
ADF
1
A
b
c
b
c.
ADF
0
ADF
1
Cell
O
A
A
c
A
O
N
O
N
a
a
ADF
0
ADF
1
b
b
A
A
c
ADF
0
ADF
1
A
a
b
Figure 6.10.
Three perfect solutions to the odd-3-parity function designed with
ADFs. Note that different building blocks are discovered and immediately used to
build the main program or cell. Note also that the number of arguments of each
ADF is not fixed and the system is free to create and then try any kind of building
block. The programs presented here have been simplified to better perceive the
underlying pattern and only the active cell is shown. Note that the pattern in
(a)
is
the already familiar pattern discovered in section 4.3.3 with the help of UDFs.
