2015 | OriginalPaper | Chapter
Witnessing (Co)datatypes
Authors : Jasmin Christian Blanchette, Andrei Popescu, Dmitriy Traytel
Published in: Programming Languages and Systems
Publisher: Springer Berlin Heidelberg
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Datatypes and codatatypes are useful for specifying and reasoning about (possibly infinite) computational processes. The Isabelle/HOL proof assistant has recently been extended with a definitional package that supports both. We describe a complete procedure for deriving nonemptiness witnesses in the general mutually recursive, nested case—nonemptiness being a proviso for introducing types in higher-order logic.