Computability in Europe 2006
Logical Approaches to Computational Barriers
|Slot:||Sat, 17:00-17:20, Faraday J (col. 5)|
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 some other energy 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 prove that they can be simulated by reversible conservative signal machines.
|websites: Arnold Beckmann||
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