A more general categorical framework for congruence of applicative bisimilarity
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We prove a general congruence result for bisimilarity in higher-order languages, which generalises previous work to languages specified by a labelled transition system in which programs may occur as labels, and which may rely on operations on terms other than capture-avoiding substitution. This is typically the case for PCF, λ-calculus with delimited continuations, and early-style bisimilarity in higher-order process calculi.
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