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Dijkstra Monads in Monadic Computation

Abstract : The Dijkstra monad has been introduced recently for capturing weakest precondition computations within the context of program verification, supported by a theorem prover. Here we give a more general description of such Dijkstra monads in a categorical setting. We first elaborate the recently developed view on program semantics in terms of a triangle of computations, state transformers, and predicate transformers. Instantiations of this triangle for different monads T show how to define the Dijkstra monad associated with T , via the logic involved. Technically, we provide a morphism of monads from the state monad transformation applied to T , to the Dijkstra monad associated with T . This monad map is precisely the weakest precondition map in the triangle, given in categorical terms by substitution.
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Bart Jacobs. Dijkstra Monads in Monadic Computation. 12th International Workshop on Coalgebraic Methods in Computer Science (CMCS), Apr 2014, Grenoble, France. pp.135-150, ⟨10.1007/978-3-662-44124-4_8⟩. ⟨hal-01408757⟩



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