MobilityReadingGroup

π-calculus, Session Types research at Imperial College

Characteristic Bisimulations for Higher-Order Session Processes
Dimitrios KOUZAPAS , Jorge A.PÉREZ , Nobuko YOSHIDA
26th International Conference on Concurrency Theory (CONCUR 2015) p. 398 - 411

Characterising contextual equivalence is a long-standing issue for higher-order (process) languages. In the setting of a higher-order π-calculus with sessions, we develop characteristic bisimilarity, a typed bisimilarity which fully characterises contextual equivalence. To our knowledge, ours is the first characterisation of its kind. Using simple values inhabiting (session) types, our approach distinguishes from untyped methods for characterising contextual equivalence in higherorder processes: we show that observing as inputs only a precise finite set of higher-order values suffices to reason about higher-order session processes. We demonstrate how characteristic bisimilarity can be used to justify optimisations in session protocols with mobile code communication.

@inproceedings{KPY2015,
  author = {Dimitrios Kouzapas and Jorge A. Pérez and Nobuko Yoshida},
  title = {{Characteristic Bisimulations for Higher-Order Session Processes}},
  booktitle = {26th International Conference on Concurrency Theory},
  series = {LIPIcs},
  volume = {42},
  pages = {398--411},
  publisher = {Schloss Dagstuhl},
  year = 2015
}
@inproceedings{KPY2015,
  author = {Dimitrios Kouzapas and Jorge A. Pérez and Nobuko Yoshida},
  title = {{Characteristic Bisimulations for Higher-Order Session Processes}},
  booktitle = {26th International Conference on Concurrency Theory},
  series = {LIPIcs},
  volume = {42},
  pages = {398--411},
  publisher = {Schloss Dagstuhl},
  doi = "10.4230/LIPIcs.CONCUR.2015.398",
  year = 2015
}