On computing Boolean functions by a spiking neuron

  • Authors:
  • Michael Schmitt

  • Affiliations:
  • Lehrstuhl Mathematik und Informatik, Fakultät für Mathematik, Ruhr‐Universität Bochum, D‐44780 Bochum, Germany E-mail: mschmitt@lmi.ruhr‐uni‐bochum.de

  • Venue:
  • Annals of Mathematics and Artificial Intelligence
  • Year:
  • 1998

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Abstract

Computations by spiking neurons are performed using the timing of action potentials. We investigate the computational power of a simple model for such a spiking neuron in the Boolean domain by comparing it with traditional neuron models such as threshold gates (or McCulloch–Pitts neurons) and sigma‐pi units (or polynomial threshold gates). In particular, we estimate the number of gates required to simulate a spiking neuron by a disjunction of threshold gates and we establish tight bounds for this threshold number. Furthermore, we analyze the degree of the polynomials that a sigma‐pi unit must use for the simulation of a spiking neuron. We show that this degree cannot be bounded by any fixed value. Our results give evidence that the use of continuous time as a computational resource endows single‐cell models with substantially larger computational capabilities.