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Horseshoe Chaos in a 3D Neural Network with Different Activation Functions

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  • Fangyan Yang
  • Song Tang
  • Guilan Xu

Abstract

This paper studies a small neural network with three neurons. First, the activation function takes the sign function. Although the network is a simple hybrid system with all subsystems being exponentially stable, we find that it can exhibit very complex dynamics such as limit cycles and chaos. Since the sign function is a limit case of sigmoidal functions, we find that chaos robustly exists with some different activation functions, which implies that such chaos in this network is more related to its weight matrix than the type of activation functions. For chaos, we present a rigorous computer-assisted study by virtue of topological horseshoe theory.

Suggested Citation

  • Fangyan Yang & Song Tang & Guilan Xu, 2013. "Horseshoe Chaos in a 3D Neural Network with Different Activation Functions," Discrete Dynamics in Nature and Society, Hindawi, vol. 2013, pages 1-6, April.
    • Handle: RePEc:hin:jnddns:430963
    DOI: 10.1155/2013/430963
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