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Keywords:

  • Finite model;
  • divisibility relation;
  • arithmetical definability;
  • FM-representability;
  • IS-interpretability;
  • FM-domain;
  • undecidability

Abstract

We prove that the finite-model version of arithmetic with the divisibility relation is undecidable (more precisely, it has Π01-complete set of theorems). Additionally we prove FM-representability theorem for this class of finite models. This means that a relation R on natural numbers can be described correctly on each input on almost all finite divisibility models if and only if R is of degree ≤0′. We obtain these results by interpreting addition and multiplication on initial segments of finite models with divisibility only. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)