Figure 3:
Matrices representing (a) the starting function
𝑓
1
(
𝑋
)
=
𝑥
3
+
𝑥
2
𝑥
1
and (b) the function
𝑓
2
(
𝑋
)
resulting from replacing each variable with the network
𝑥
3
⊕
𝑥
2
⊕
𝑥
1
.