On linear rewriting systems for Boolean logic and some applications to proof theory

Linear rules have played an increasing role in structural proof theory in recent years. It has been observed that the set of all sound linear inference rules in Boolean logic is already coNP-complete, i.e. that every Boolean tautology can be written as a (left- and right-)linear rewrite rule. In thi...

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Main Authors: Anupam Das, Lutz Straßburger
Format: Article
Language:English
Published: Logical Methods in Computer Science e.V. 2017-04-01
Series:Logical Methods in Computer Science
Subjects:
Online Access:https://lmcs.episciences.org/2621/pdf
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author Anupam Das
Lutz Straßburger
author_facet Anupam Das
Lutz Straßburger
author_sort Anupam Das
collection DOAJ
description Linear rules have played an increasing role in structural proof theory in recent years. It has been observed that the set of all sound linear inference rules in Boolean logic is already coNP-complete, i.e. that every Boolean tautology can be written as a (left- and right-)linear rewrite rule. In this paper we study properties of systems consisting only of linear inferences. Our main result is that the length of any 'nontrivial' derivation in such a system is bound by a polynomial. As a consequence there is no polynomial-time decidable sound and complete system of linear inferences, unless coNP=NP. We draw tools and concepts from term rewriting, Boolean function theory and graph theory in order to access some required intermediate results. At the same time we make several connections between these areas that, to our knowledge, have not yet been presented and constitute a rich theoretical framework for reasoning about linear TRSs for Boolean logic.
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spelling doaj.art-2fdcd8809e30471b89df06d0ffd814b52024-03-08T09:45:41ZengLogical Methods in Computer Science e.V.Logical Methods in Computer Science1860-59742017-04-01Volume 12, Issue 410.2168/LMCS-12(4:9)20162621On linear rewriting systems for Boolean logic and some applications to proof theoryAnupam Dashttps://orcid.org/0000-0002-0142-3676Lutz StraßburgerLinear rules have played an increasing role in structural proof theory in recent years. It has been observed that the set of all sound linear inference rules in Boolean logic is already coNP-complete, i.e. that every Boolean tautology can be written as a (left- and right-)linear rewrite rule. In this paper we study properties of systems consisting only of linear inferences. Our main result is that the length of any 'nontrivial' derivation in such a system is bound by a polynomial. As a consequence there is no polynomial-time decidable sound and complete system of linear inferences, unless coNP=NP. We draw tools and concepts from term rewriting, Boolean function theory and graph theory in order to access some required intermediate results. At the same time we make several connections between these areas that, to our knowledge, have not yet been presented and constitute a rich theoretical framework for reasoning about linear TRSs for Boolean logic.https://lmcs.episciences.org/2621/pdfcomputer science - logic in computer sciencef.4.1i.2.3
spellingShingle Anupam Das
Lutz Straßburger
On linear rewriting systems for Boolean logic and some applications to proof theory
Logical Methods in Computer Science
computer science - logic in computer science
f.4.1
i.2.3
title On linear rewriting systems for Boolean logic and some applications to proof theory
title_full On linear rewriting systems for Boolean logic and some applications to proof theory
title_fullStr On linear rewriting systems for Boolean logic and some applications to proof theory
title_full_unstemmed On linear rewriting systems for Boolean logic and some applications to proof theory
title_short On linear rewriting systems for Boolean logic and some applications to proof theory
title_sort on linear rewriting systems for boolean logic and some applications to proof theory
topic computer science - logic in computer science
f.4.1
i.2.3
url https://lmcs.episciences.org/2621/pdf
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