Reversible conservative rational abstract geometrical computation is turing-universal

  • Authors:
  • Jérôme Durand-Lose

  • Affiliations:
  • Laboratoire d'Informatique Fondamentale d'Orléans, Université d'Orléans, ORLÉANS

  • Venue:
  • CiE'06 Proceedings of the Second conference on Computability in Europe: logical Approaches to Computational Barriers
  • Year:
  • 2006

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Abstract

In Abstract geometrical computation for black hole computation (MCU '04, LNCS 3354), the author provides a setting based on rational numbers, abstract geometrical computation, with super-Turing capability. In the present paper, we prove the Turing computing capability of reversible conservative abstract geometrical computation. Reversibility allows backtracking as well as saving energy; it corresponds here to the local reversibility of collisions. Conservativeness corresponds to the preservation of another energy measure ensuring that the number of signals remains bounded. We first consider 2-counter automata enhanced with a stack to keep track of the computation. Then we built a simulation by reversible conservative rational signal machines.