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Canonical Equational Proofs By Leo Bachmair

Canonical Equational Proofs
by Leo Bachmair

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Equations occur in many computer applications, such as symbolic compu- tation, functional programming, abstract data type specifications, program verification, program synthesis, and automated theorem proving.
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Canonical Equational Proofs Summary


Canonical Equational Proofs by Leo Bachmair

Equations occur in many computer applications, such as symbolic compu- tation, functional programming, abstract data type specifications, program verification, program synthesis, and automated theorem proving. Rewrite systems are directed equations used to compute by replacing subterms in a given formula by equal terms until a simplest form possible, called a normal form, is obtained. The theory of rewriting is concerned with the compu- tation of normal forms. We shall study the use of rewrite techniques for reasoning about equations. Reasoning about equations may, for instance, involve deciding whether an equation is a logical consequence of a given set of equational axioms. Convergent rewrite systems are those for which the rewriting process de- fines unique normal forms. They can be thought of as non-deterministic functional programs and provide reasonably efficient decision procedures for the underlying equational theories. The Knuth-Bendix completion method provides a means of testing for convergence and can often be used to con- struct convergent rewrite systems from non-convergent ones. We develop a proof-theoretic framework for studying completion and related rewrite- based proof procedures. We shall view theorem provers as proof transformation procedures, so as to express their essential properties as proof normalization theorems.

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Table of Contents


1 Equational Proofs.- 1.1. Introduction.- 1.2. Terms.- 1.3. Equations.- 1.4. Orderings.- 1.5. Proofs.- 2 Standard Completion.- 2.1. Basic Completion.- 2.2. Proof Transformation.- 2.3. Proof Simplification.- 2.4. Fairness and Correctness.- 2.5. Standard Completion.- 2.6. Critical Pair Criteria.- 3 Extended Completion.- 3.1. Rewriting Modulo a Congruence.- 3.2. The Left-Linear Rule Method.- 3.3. Church-Rosser Systems.- 3.4. Extended Completion.- 3.5. The Extended Rule Method.- 3.6. Associative-Commutative Completion.- 3.7. The Protected Rule Method.- 3.8. Extended Critical Pair Criteria.- 4 Ordered Completion.- 4.1. Ordered Completion.- 4.2. Construction of Convergent Rewrite Systems.- 4.3. Refutational Theorem Proving.- 4.4. Horn Clauses with Equality.- 5 Proof by Consistency.- 5.1. Consistency and Ground Reducibility.- 5.2. Proof by Consistency.- 5.3. Refutation Completeness.- 5.4. Covering Sets.

Additional information

GOR010244286
Canonical Equational Proofs by Leo Bachmair
Leo Bachmair
Progress in Theoretical Computer Science
Used - Very Good
Paperback
Birkhauser Boston Inc
1991-06-01
138
0817635556
9780817635558
N/A
Book picture is for illustrative purposes only, actual binding, cover or edition may vary.
This is a used book - there is no escaping the fact it has been read by someone else and it will show signs of wear and previous use. Overall we expect it to be in very good condition, but if you are not entirely satisfied please get in touch with us.