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How to prove decidability of equational theories with second-order computation analyser SOL

Part of: ICFP2017 JFP Research Articles

Published online by Cambridge University Press:  24 December 2019

MAKOTO HAMANA Open the ORCID record for MAKOTO HAMANA [Opens in a new window]
MAKOTO HAMANA*
Affiliation:
Gunma University, Kiryu, Gunma, Japan (e-mail: hamana@cs.gunma-u.ac.jp)
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Abstract

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We present a general methodology of proving the decidability of equational theory of programming language concepts in the framework of second-order algebraic theories. We propose a Haskell-based analysis tool, i.e. Second-Order Laboratory, which assists the proofs of confluence and strong normalisation of computation rules derived from second-order algebraic theories. To cover various examples in programming language theory, we combine and extend both syntactical and semantical results of the second-order computation in a non-trivial manner. We demonstrate how to prove decidability of various algebraic theories in the literature. It includes the equational theories of monad and λ-calculi, Plotkin and Power’s theory of states and bits, and Stark’s theory of π-calculus. We also demonstrate how this methodology can solve the coherence of monoidal categories.

Video Abstract

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Type
Regular Paper
Information
Journal of Functional Programming , Volume 29 , 2019 , e20
Copyright
© Cambridge University Press 2019 

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