English

An intuitionistically complete system of basic intuitionistic conditional logic

Logic 2023-06-21 v1

Abstract

We introduce a basic intuitionistic conditional logic IntCK\mathsf{IntCK} that we show to be complete both relative to a special type of Kripke models and relative to a standard translation into first-order intuitionistic logic. We show that IntCK\mathsf{IntCK} stands in a very natural relation to other similar logics, like the basic classical conditional logic CK\mathsf{CK} and the basic intuitionistic modal logic IK\mathsf{IK}. As for the basic intuitionistic conditional logic ICK\mathsf{ICK} proposed by Y. Weiss, IntCK\mathsf{IntCK} extends its language with a diamond-like conditional modality, but its diamond-conditional-free fragment is also a proper extension of ICK\mathsf{ICK}. We briefly discuss the resulting gap between the two candidate systems of basic intuitionistic conditional logic and the possible pros and cons of both candidates.

Keywords

Cite

@article{arxiv.2306.10402,
  title  = {An intuitionistically complete system of basic intuitionistic conditional logic},
  author = {Grigory Olkhovikov},
  journal= {arXiv preprint arXiv:2306.10402},
  year   = {2023}
}

Comments

36 pages, 0 figures

R2 v1 2026-06-28T11:08:00.406Z