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Proving Soundness of Extensional Normal-Form Bisimilarities

Dariusz Biernacki ; Serguei Lenglet ; Piotr Polesiuk.

Normal-form bisimilarity is a simple, easy-to-use behavioral equivalence that relates terms in $\lambda$-calculi by decomposing their normal forms into bisimilar subterms. Moreover, it typically allows for powerful up-to techniques, such as bisimulation up to context, which simplify bisimulation&nbsp;[&hellip;]

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Bisimulations for Delimited-Control Operators

Dariusz Biernacki ; Sergueï Lenglet ; Piotr Polesiuk.

We present a comprehensive study of the behavioral theory of an untyped $\lambda$-calculus extended with the delimited-control operators shift and reset. To that end, we define a contextual equivalence for this calculus, that we then aim to characterize with coinductively defined relations, called&nbsp;[&hellip;]

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Fully Abstract Encodings of $\lambda$-Calculus in HOcore through Abstract Machines

Małgorzata Biernacka ; Dariusz Biernacki ; Sergueï Lenglet ; Piotr Polesiuk ; Damien Pous ; Alan Schmitt.

We present fully abstract encodings of the call-by-name and call-by-value $\lambda$-calculus into HOcore, a minimal higher-order process calculus with no name restriction. We consider several equivalences on the $\lambda$-calculus side -- normal-form bisimilarity, applicative bisimilarity, and&nbsp;[&hellip;]

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