Learning the unlearnable

  • Authors:
  • Dan Nabutovsky;Eytan Domany

  • Affiliations:
  • Department of Electronics, Weizmann Institute of Science, Rehovot 76100, Israel;Department of Theoretical Physics, Oxford University, Oxford, OX1 3NP, United Kingdom

  • Venue:
  • Neural Computation
  • Year:
  • 1991

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Abstract

We present a local perceptron-learning rule that either converges to a solution, or establishes linear nonseparability. We prove that when no solution exists, the algorithm detects this in a finite time (number of learning steps). This time is polynomial in typical cases and exponential in the worst case, when the set of patterns is nonstrictly linearly separable. The algorithm is local and has no arbitrary parameters.