A comprehensive combination framework

  • Authors:
  • Silvio Ghilardi;Enrica Nicolini;Daniele Zucchelli

  • Affiliations:
  • Università degli Studi di Milano, Milan, Italy;Università degli Studi di Milano, Milan, Italy;Università degli Studi di Milano, Milan, Italy and LORIA & INRIA-Lorraine

  • Venue:
  • ACM Transactions on Computational Logic (TOCL)
  • Year:
  • 2008

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Abstract

We define a general notion of a fragment within higher-order type theory; a procedure for constraint satisfiability in combined fragments is outlined, following Nelson-Oppen schema. The procedure is in general only sound, but it becomes terminating and complete when the shared fragment enjoys suitable noetherianity conditions and admits an abstract version of a “Keisler-Shelah-like” isomorphism theorem. We show that this general decidability transfer result covers recent work on combination in first-order theories as well as in various intensional logics such as description, modal, and temporal logics.