A bifibrational reconstruction of Lawvere's presheaf hyperdoctrine

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Authors

Colleges, School and Institutes

External organisations

  • CNRS
  • Université Paris Diderot – Paris 7

Abstract

Combining insights from the study of type refinement systems and of monoidal closed chiralities, we show how to reconstruct Lawvere's hyperdoctrine of presheaves using a full and faithful embedding into a monoidal closed bifibration living now over the compact closed category of small categories and distributors. Besides revealing dualities which are not immediately apparent in the traditional presentation of the presheaf hyperdoctrine, this reconstruction leads us to an axiomatic treatment of directed equality predicates (modelled by hom presheaves), realizing a vision initially set out by Lawvere (1970). It also leads to a simple calculus of string diagrams (representing presheaves) that is highly reminiscent of C. S. Peirce's existential graphs for predicate logic, refining an earlier interpretation of existential graphs in terms of Boolean hyperdoctrines by Brady and Trimble. Finally, we illustrate how this work extends to a bifibrational setting a number of fundamental ideas of linear logic.

Details

Original languageEnglish
Title of host publicationProceedings of the 31st Annual ACM/IEEE Symposium on Logic in Computer Science (LICS '16)
Publication statusPublished - 5 Jul 2016

Keywords

  • Lawvere's presheaf hyperdoctrine, linear logic, monoidal closed bifibrations, monoidal closed chiralities, type refinement systems