Abr;This paper demonstrates that fuzzy logic systems and feedforward neural
networks are equivalent in essence. First, we introduce the concept of int
erpolation representations of fuzzy logic systems and several important con
clusions. We then define mathematical model for rectangular wave neural net
works and nonlinear neural networks. With this definition, we prove that no
nlinear neural networks can be represented by rectangular wave neural netwo
rks. Based on this result, we prove the equivalence between fuzzy logic sys
tems and feedforward neural networks, This result provides us a very useful
guideline when we perform theoretical research and applications on fuzzy l
ogic systems, neural networks, or neuro-fuzzy systems.