English

Second order intuitionistic propositional logic of the real line is decidable

Logic 2016-12-22 v1

Abstract

It is known that the set of tautologies of second order intuitionistic propositional logic, IPC2\mathrm{IPC} 2, is undecidable. Here, we prove that the sets of formulas of IPC2\mathrm{IPC} 2 which are true in the algebra of open subsets of reals or rationals are decidable.

Keywords

Cite

@article{arxiv.1612.07167,
  title  = {Second order intuitionistic propositional logic of the real line is decidable},
  author = {Konrad Zdanowski},
  journal= {arXiv preprint arXiv:1612.07167},
  year   = {2016}
}
R2 v1 2026-06-22T17:30:58.458Z