Synthetic Completeness Proofs for Seligman-style Tableau Systems

Klaus Frovin Jørgensen, Patrick Rowan Blackburn, Thomas Bolander, Torben Braüner

Publikation: Bidrag til bog/antologi/rapportKonferencebidrag i proceedingsForskningpeer review


Hybrid logic is a form of modal logic which allows reference to worlds. We can think of it as ‘modal logic with labelling built into the object language’ and various forms of labelled deduction have played a central role in its proof theory. Jerry Seligman’s work [11,12] in which ‘rules involving labels’ are rejected in favour of ‘rules for all’ is an interesting exception to this. Seligman’s approach was originally for natural deduction; the authors of the present paper recently extended it to tableau inference [1,2]. Our earlier work was syntactic: we showed completeness by translating between Seligman-style and labelled tableaus, but our results only covered the minimal hy- brid logic; in the present paper we provide completeness results for a wider range of hybrid logics and languages. We do so by adapting the synthetic approach to tableau completeness (due to Smullyan, and widely applied in modal logic by Fitting) so that we can directly build maximal consistent sets of tableau blocks.
TitelProceedings of Advances in Modal Logic 2016
RedaktørerLev Beklemishev, Stéphane Demri, András Máté
ForlagCollege Publications
ISBN (Trykt)978-1-84890-201-5
StatusUdgivet - 2016
BegivenhedAdvances in Modal Logic 2016 - Eotvos University, Budapest, Ungarn
Varighed: 30 aug. 20162 sep. 2016 (Link til konference)


KonferenceAdvances in Modal Logic 2016
LokationEotvos University


  • Hybrid logic
  • difference operator
  • universal modality
  • tense logic
  • pure axioms
  • Bridge rule
  • synthetic completeness method
  • Seligman-style
  • tableaus

Citer dette