Generic Weakest Precondition Semantics from Monads Enriched with Order

Ichiro Hasuo (1)

1 UTokyo - The University of Tokyo

We devise a generic framework where a weakest precondition semantics, in the form of indexed posets, is derived from a monad whose Kleisli category is enriched by posets. It is inspired by Jacobs’ recent identification of a categorical structure that is common in various predicate transformers, but adds generality in the following aspects: (1) different notions of modality (such as “may” vs. “must”) are captured by Eilenberg-Moore algebras; (2) nested branching—like in games and in probabilistic systems with nondeterministic environments—is modularly modeled by a monad on the Eilenberg-Moore category of another.

Domaines: Informatique [cs]

Ichiro Hasuo. Generic Weakest Precondition Semantics from Monads Enriched with Order. 12th International Workshop on Coalgebraic Methods in Computer Science (CMCS 2014), Apr 2014, Grenoble, France. pp.10-32, ⟨10.1007/978-3-662-44124-4_2⟩. ⟨hal-01408750⟩