Abstract
AbstractIn Chapter 7 we showed that the saturated-linear activation function is not unique in its Turing universality, but rather that various sigmoidal-like activation functions can form finite-size architectures which are Turing universal as well. The class of activation functions considered in this chapter is much wider than that of the previous chapter, and as a result the lower bound on its computational power is weaker. We prove that any function for which the left and right limits exist and are different can serve as an activation function for the neurons to yield a network that is at least as strong computationally as a finite automaton.
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