Abstract

We develop a logic for proving call-by-value observational congruences between pure simply-typed λ-terms. The logic is complete for proving equations in a standard call-by-value model, settling an open question of [10]. By the full abstraction theorem of [20, 22], the logic proves all call-by-value observational congruences between pure terms. Finally, we show that the equations true in the standard model are decidable.

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