Probabilistic and team PFIN-type learning: General properties

  • Authors:
  • Andris Ambainis

  • Affiliations:
  • Department of Combinatorics and Optimization and Institute for Quantum Computing, University of Waterloo, 200 University Avenue West, Waterloo, ON N2T 2L2, Canada

  • Venue:
  • Journal of Computer and System Sciences
  • Year:
  • 2008

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Abstract

We consider the probability hierarchy for Popperian FINite learning and study the general properties of this hierarchy. We prove that the probability hierarchy is decidable, i.e. there exists an algorithm that receives p"1 and p"2 and answers whether PFIN-type learning with the probability of success p"1 is equivalent to PFIN-type learning with the probability of success p"2. To prove our result, we analyze the topological structure of the probability hierarchy. We prove that it is well-ordered in descending ordering and order-equivalent to ordinal @e"0. This shows that the structure of the hierarchy is very complicated. Using similar methods, we also prove that, for PFIN-type learning, team learning and probabilistic learning are of the same power.