English

RCF2: Evaluation and Consistency

Category Theory 2009-01-30 v2 Logic

Abstract

We construct here an iterative evaluation of all PR map codes: progress of this iteration is measured by descending complexity within "Ordinal" O := N[\omega] of polynomials in one indeterminate, ordered lexicographically. Non-infinit descent of such iterations is added as a mild additional axiom schema (\pi_O) to Theory PR_A = PR+(abstr) of Primitive Recursion with predicate abstraction, out of forgoing part RCF 1. This then gives (correct) "on"-termination of iterative evaluation of argumented deduction trees as well, for theories PR_A+(\pi_O). By means of this constructive evaluation the Main Theorem is proved, on Termination-conditioned (Inner) Soundness for such theories, Ordinal O extending N[\omega]. As a consequence we get Self-Consistency for these theories, namely derivation of its own free-variable Consistency formula. As to expect from classical setting, Self-Consistency gives (unconditioned) Objective Soundness. Termination-Conditioned Soundness holds "already" for PR_A, but it turns out that at least present derivation of Consistency from this conditioned Soundness depends on schema (\pi_O) of non-infinit descent in Ordinal O := \N[\omega].

Keywords

Cite

@article{arxiv.0809.3881,
  title  = {RCF2: Evaluation and Consistency},
  author = {Michael Pfender},
  journal= {arXiv preprint arXiv:0809.3881},
  year   = {2009}
}

Comments

Full version. Inserted Sections 3-7, Coda. Introduction and summary unchanged

R2 v1 2026-06-21T11:23:08.129Z