A Formal Proof of Dickson’s Lemma in ACL2

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Dickson’s Lemma is the main result needed to prove the termination of Buchberger’s algorithm for computing Gröbner basis of polynomial ideals. In this case study, we present a formal proof of Dickson’s Lemma using the ACL2 system. Due to the limited expressiveness of the ACL2 logic, the classical non-constructive proof of this result cannot be done in ACL2. Instead, we formalize a proof where the termination argument is justified by the multiset extension of a well-founded relation.