Unified correspondence as a proof-theoretic tool

Giuseppe Greco, Minghui Ma, Alessandra Palmigiano, Apostolos Tzimoulis, Zhiguang Zhao

Research output: Contribution to journalArticleScientificpeer-review

24 Citations (Scopus)


The present article aims at establishing formal connections between correspondence phenomena, well known from the area of modal logic, and the theory of display calculi, originated by Belnap. These connections have been seminally observed and exploited by Marcus Kracht, in the context of his characterization of the modal axioms (which he calls primitive formulas) which can be effectively transformed into ‘analytic’ structural rules of display calculi. In this context, a rule is ‘analytic’ if adding it to a display calculus preserves Belnap’s cut-elimination theorem. In recent years, the state-of-the-art in correspondence theory has been uniformly extended from classical modal logic to diverse families of non-classical logics, ranging from (bi-)intuitionistic (modal) logics, linear, relevant and other substructural logics, to hybrid logics and mu-calculi. This generalization has given rise to a theory called unified correspondence, the most important technical tools of which are the algorithm ALBA, and the syntactic characterization of Sahlqvist-type classes of formulas and inequalities which is uniform in the setting of normal DLE-logics (logics the algebraic semantics of which is based on bounded distributive lattices). We apply unified correspondence theory, with its tools and insights, to extend Kracht’s results and prove his claims in the setting of DLE-logics. The results of the present article characterize the space of properly displayable DLE-logics.
Original languageEnglish
JournalJournal of Logic and Computation
Publication statusE-pub ahead of print - 7 Aug 2016


  • Display calculi
  • unified correspondence
  • distributive lattice expansions
  • properly displayable logics

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