Environmental Bisimulations for Probabilistic Higher-Order Languages
Environmental bisimulations in probabilistic higher-order languages are studied. In contrast with applicative bisimulations, environmental bisimulations are known to be more robust and do not require sophisticated techniques such as Howe’s in the proofs of congruence.
As representative calculi, call-by-name and call-by-value $\lambda$-calculus, and a (call-by-value) $\lambda$-calculus extended with references (i.e., a store) are considered. In each case full abstraction results are derived for probabilistic environmental similarity and bisimilarity with respect to contextual preorder and contextual equivalence, respectively. Some possible enhancements of the (bi)simulations, as `up-to techniques’, are also presented.
Probabilities force a number of modifications to the definition of environmental bisimulations in non-probabilistic languages. Some of these modifications are specific to probabilities, others may be seen as general refinements of environmental bisimulations, applicable also to non-probabilistic languages. Several examples are presented, to illustrate the modifications and the differences.
Thu 21 JanDisplayed time zone: Guadalajara, Mexico City, Monterrey change
16:30 - 17:45
Track 2: Sessions and processesResearch Papers at Grand Bay South
Chair(s): Matteo Maffei Saarland University
|Effects as sessions, sessions as effects|
Dominic Orchard Imperial College London, Nobuko Yoshida Imperial College London, UKPre-print Media Attached
|Monitors and Blame Assignment for Higher-Order Session Types|
Limin Jia Carnegie Mellon University, Hannah Gommerstadt Carnegie Mellon University, Frank Pfenning Carnegie Mellon UniversityMedia Attached File Attached
|Environmental Bisimulations for Probabilistic Higher-Order Languages|
Davide Sangiorgi University of Bologna, Valeria Vignudelli University of Bologna/INRIAMedia Attached