Universal Semantics for the Stochastic Lambda-Calculus

Pedro Amorim, Dexter Kozen, Radu Mardare, Prakash Panangaden, Michael Roberts

We define sound and adequate denotational and operational semantics for the stochastic lambda calculus. These two semantic approaches build on previous work that used similar techniques to reason about higher-order probabilistic programs, but for the first time admit an adequacy theorem relating the operational and denotational views. This resolves the main issue left open in (Bacci et al. 2018).

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