Linear Logical Relations for Session-Based Concurrency

  • Jorge A. Pérez
  • Luís Caires
  • Frank Pfenning
  • Bernardo Toninho
Part of the Lecture Notes in Computer Science book series (LNCS, volume 7211)


In prior work we proposed an interpretation of intuitionistic linear logic propositions as session types for concurrent processes. The type system obtained from the interpretation ensures fundamental properties of session-based typed disciplines—most notably, type preservation, session fidelity, and global progress. In this paper, we complement and strengthen these results by developing a theory of logical relations. Our development is based on, and is remarkably similar to, that for functional languages, extended to an (intuitionistic) linear type structure. A main result is that well-typed processes always terminate (strong normalization). We also introduce a notion of observational equivalence for session-typed processes. As applications, we prove that all proof conversions induced by the logic interpretation actually express observational equivalences, and explain how type isomorphisms resulting from linear logic equivalences are realized by coercions between interface types of session-based concurrent systems.


Logical Relation Logical Predicate Closure Property Label Transition System Typing Rule 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Jorge A. Pérez
    • 1
  • Luís Caires
    • 1
  • Frank Pfenning
    • 2
  • Bernardo Toninho
    • 1
    • 2
  1. 1.CITI and Departamento de InformáticaFCT, Universidade Nova de LisboaPortugal
  2. 2.Computer Science DepartmentCarnegie Mellon UniversityUSA

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