Certified Kruskal's Tree Theorem

This article presents the first formalization of Kurskal's tree theorem in aproof assistant. The Isabelle/HOL development is along the lines of Nash-Williams' original minimal bad sequence argument for proving the treetheorem. Along the way, proofs of Dickson's lemma and Higman's...

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Bibliographic Details
Main Author: Christian Sternagel
Format: Article
Language:English
Published: University of Bologna 2014-07-01
Series:Journal of Formalized Reasoning
Subjects:
Online Access:http://jfr.unibo.it/article/view/4213