Title
Uniform Normalisation beyond Orthogonality
Abstract
A rewrite system is called uniformly normalising if all its steps are perpetual, i.e. are such that if s → t and s has an infinite reduction, then t has one too. For such systems termination (SN) is equivalent to normalisation (WN). A well-known fact is uniform normalisation of orthogonal non-erasing term rewrite systems, e.g. the λI-calculus. In the present paper both restrictions are analysed. Orthogonality is seen to pertain to the linear part and non-erasingness to the non-linear part of rewrite steps. Based on this analysis, a modular proof method for uniform normalisation is presented which allows to go beyond orthogonality. The method is shown applicable to biclosed first- and second-order term rewrite systems as well as to a λ-calculus with explicit substitutions.
Year
Venue
Keywords
2001
Lecture Notes in Computer Science
modular proof method,uniform normalisation,orthogonal non-erasing term,present paper,second-order term,infinite reduction,non-linear part,linear part,explicit substitution,systems termination,second order
Field
DocType
ISBN
Discrete mathematics,Normalisation by evaluation,Automated theorem proving,Algorithm,Orthogonality,Critical pair,Fundamental theorem,Modular design,Mathematics
Conference
3-540-42117-3
Citations 
PageRank 
References 
4
0.46
12
Authors
3
Name
Order
Citations
PageRank
Zurab Khasidashvili130725.40
Mizuhito Ogawa213523.17
Vincent van Oostrom350538.41