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NaDeA: A Natural Deduction Assistant with a Formalization in Isabelle

We present a new software tool for teaching logic based on natural deduction. Its proof system is formalized in the proof assistant Isabelle such that its definition is very precise. Soundness of the formalization has been proved in Isabelle. The tool is open source software developed in TypeScript / JavaScript and can thus be used directly in a browser without any further installation. Although developed for undergraduate computer science students who are used to study and program concrete computer code in a programming language we consider the approach relevant for a broader audience and for other proof systems as well.

preprint2015arXivOpen access
Jørgen VilladsenAlexander Birch JensenAnders Schlichtkrull
Logic in Computer Sciencecs.CY
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Jørgen VilladsenAlexander Birch JensenAnders Schlichtkrull

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