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  Cancellative Abelian Monoids in Refutational Theorem Proving

Waldmann, U. (1997). Cancellative Abelian Monoids in Refutational Theorem Proving. PhD Thesis, Universität des Saarlandes, Saarbrücken.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-000F-38BE-0 Version Permalink: https://hdl.handle.net/21.11116/0000-000E-343B-6
Genre: Thesis

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 Creators:
Waldmann, Uwe1, 2, Author                 
Affiliations:
1Automation of Logic, MPI for Informatics, Max Planck Society, ou_1116545              
2Programming Logics, MPI for Informatics, Max Planck Society, ou_40045              

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 Abstract: We present a constraint superposition calculus in which the axioms of cancellative abelian monoids and, optionally, further axioms (e.g., torsion-freeness) are integrated. Cancellative abelian monoids comprise abelian groups, but also such ubiquitous structures as the natural numbers or multisets. Our calculus requires neither extended clauses nor explicit inferences with the theory axioms. The number of variable overlaps is significantly reduced by strong ordering restrictions and powerful variable elimination techniques; in divisible torsion-free abelian groups, variable overlaps can even be avoided completely. Thanks to the equivalence of torsion-free cancellative and totally ordered abelian monoids, our calculus allows us to solve equational problems in totally ordered abelian monoids without requiring a detour via ordering literals.

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Language(s): eng - English
 Dates: 2010-03-121997-07-281997
 Publication Status: Issued
 Pages: -
 Publishing info: Saarbrücken : Universität des Saarlandes
 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 519851
Other: Local-ID: C1256104005ECAFC-0677A953E435DEBCC12565850050E6A5-Waldmann1997
 Degree: PhD

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