Hostname: page-component-7b7567c8c-tnzcf Total loading time: 0 Render date: 2026-11-13T18:42:18.702Z Has data issue: false hasContentIssue false

Which structural rules admit cut elimination? An algebraic criterion

Published online by Cambridge University Press:  12 March 2014

Kazushige Terui*
Affiliation:
National Institute of Informatics2-1-2 Hitotsubashi, Chiyoda-Ku Tokyo 101-8430, Japan. E-mail: terui@nii.ac.jp

Abstract

Consider a general class of structural inference rules such as exchange, weakening, contraction and their generalizations. Among them, some are harmless but others do harm to cut elimination. Hence it is natural to ask under which condition cut elimination is preserved when a set of structural rules is added to a structure-free logic. The aim of this work is to give such a condition by using algebraic semantics.

We consider full Lambek calculus (FL), i.e., intuitionistic logic without any structural rules, as our basic framework. Residuated lattices are the algebraic structures corresponding to FL. In this setting, we introduce a criterion, called the propagation property, that can be stated both in syntactic and algebraic terminologies. We then show that, for any set ℛ of structural rules, the cut elimination theorem holds for FL enriched with ℛ if and only if ℛ satisfies the propagation property.

As an application, we show that any set ℛ of structural rules can be “completed” into another set ℛ*, so that the cut elimination theorem holds for FL enriched with ℛ*. while the provability remains the same.

Information

Type
Research Article
Copyright
Copyright © Association for Symbolic Logic 2007

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable