### Abstract

We propose a new bi-intuitionistic type theory called Dualized Type Theory (DTT). It is a simple type theory with perfect intuitionistic duality, and corresponds to a single-sided polarized sequent calculus. We prove DTT strongly normalizing, and prove type preservation. DTT is based on a new propositional bi-intuitionistic logic called Dualized Intuitionistic Logic (DIL) that builds on Pinto and Uustalu’s logic L. DIL is a simplification of L by removing several admissible inference rules while maintaining consistency and completeness. Furthermore, DIL is defined using a dualized syntax by labeling formulas and logical connectives with polarities thus reducing the number of inference rules needed to define the logic. We give a direct proof of consistency, but prove completeness by reduction to L.

Original language | English (US) |
---|---|

Journal | Logical Methods in Computer Science |

Volume | 12 |

Issue number | 3 |

DOIs | |

State | Published - Jan 1 2016 |

### Fingerprint

### Keywords

- Bi-intuitionistic logic
- Coinduction
- Completeness
- Consistency
- Dual
- Exclusion
- Kripke model
- Sequent calculus
- Simple type theory
- Subtraction

### ASJC Scopus subject areas

- Theoretical Computer Science
- Computer Science(all)

### Cite this

*Logical Methods in Computer Science*,

*12*(3). https://doi.org/10.2168/LMCS-12(3:2)2016

**Dualized simple type theory.** / Eades, Harley D; Stump, Aaron; McCleeary, Ryan.

Research output: Contribution to journal › Article

*Logical Methods in Computer Science*, vol. 12, no. 3. https://doi.org/10.2168/LMCS-12(3:2)2016

}

TY - JOUR

T1 - Dualized simple type theory

AU - Eades, Harley D

AU - Stump, Aaron

AU - McCleeary, Ryan

PY - 2016/1/1

Y1 - 2016/1/1

N2 - We propose a new bi-intuitionistic type theory called Dualized Type Theory (DTT). It is a simple type theory with perfect intuitionistic duality, and corresponds to a single-sided polarized sequent calculus. We prove DTT strongly normalizing, and prove type preservation. DTT is based on a new propositional bi-intuitionistic logic called Dualized Intuitionistic Logic (DIL) that builds on Pinto and Uustalu’s logic L. DIL is a simplification of L by removing several admissible inference rules while maintaining consistency and completeness. Furthermore, DIL is defined using a dualized syntax by labeling formulas and logical connectives with polarities thus reducing the number of inference rules needed to define the logic. We give a direct proof of consistency, but prove completeness by reduction to L.

AB - We propose a new bi-intuitionistic type theory called Dualized Type Theory (DTT). It is a simple type theory with perfect intuitionistic duality, and corresponds to a single-sided polarized sequent calculus. We prove DTT strongly normalizing, and prove type preservation. DTT is based on a new propositional bi-intuitionistic logic called Dualized Intuitionistic Logic (DIL) that builds on Pinto and Uustalu’s logic L. DIL is a simplification of L by removing several admissible inference rules while maintaining consistency and completeness. Furthermore, DIL is defined using a dualized syntax by labeling formulas and logical connectives with polarities thus reducing the number of inference rules needed to define the logic. We give a direct proof of consistency, but prove completeness by reduction to L.

KW - Bi-intuitionistic logic

KW - Coinduction

KW - Completeness

KW - Consistency

KW - Dual

KW - Exclusion

KW - Kripke model

KW - Sequent calculus

KW - Simple type theory

KW - Subtraction

UR - http://www.scopus.com/inward/record.url?scp=85003548398&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85003548398&partnerID=8YFLogxK

U2 - 10.2168/LMCS-12(3:2)2016

DO - 10.2168/LMCS-12(3:2)2016

M3 - Article

VL - 12

JO - Logical Methods in Computer Science

JF - Logical Methods in Computer Science

SN - 1860-5974

IS - 3

ER -