Experimental computation of real numbers by Newtonian machines

Author:

Beggs E.J1,Tucker J.V2

Affiliation:

1. Department of Mathematics, University of Wales SwanseaSingleton Park, Swansea SA3 2HN, UK

2. Department of Computer Science, University of Wales SwanseaSingleton Park, Swansea SA3 2HN, UK

Abstract

Following a methodology we have proposed for analysing the nature of experimental computation, we prove that there is a three-dimensional Newtonian machine which given any point x ∈[0, 1] can generate an infinite sequence [ p n , q n ], for n =1, 2, …, of rational number interval approximations, that converges to x as n →∞. The machine is a system for scattering and collecting particles. The theorem implies that every point x∈[0, 1] is computable by a simple Newtonian kinematic system that is bounded in space and mass and for which the calculation of the nth approximation of x takes place in O ( n ) time with O ( n ) energy. We describe variants of the scatter machine which explain why our machine is non-deterministic.

Publisher

The Royal Society

Subject

General Physics and Astronomy,General Engineering,General Mathematics

Reference45 articles.

1. Beggs E. J. & Tucker J. V. 2004 Computations via experiments with kinematic systems. Research Report no. 4.04 Department of Mathematics University of Wales Swansea or Technical Report no. 5-2004 Department of Computer Science University of Wales Swansea.

2. Embedding infinitely parallel computation in Newtonian kinematics;Beggs E.J;Appl. Math. Comput,2006

3. Can Newtonian systems, bounded in space, time, mass and energy compute all functions?

4. Dynamical systems that sort lists, diagonalize matrices, and solve linear programming problems

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