License: Creative Commons Attribution 3.0 Unported license (CC BY 3.0)
When quoting this document, please refer to the following
DOI: 10.4230/LIPIcs.CSL.2015.423
URN: urn:nbn:de:0030-drops-54293
URL: https://drops.dagstuhl.de/opus/volltexte/2015/5429/
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Liu, Jiaxiang ; Jouannaud, Jean-Pierre ; Ogawa, Mizuhito

Confluence of Layered Rewrite Systems

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Abstract

We investigate a new, Turing-complete class of layered systems, whose linearized lefthand sides of rules can only be overlapped at the root position. Layered systems define a natural notion of rank for terms: the maximal number of redexes along a path from the root to a leaf. Overlappings are allowed in finite or infinite trees. Rules may be non-terminating, non-left-linear, or non-right- linear. Using a novel unification technique, cyclic unification, we show that rank non-increasing layered systems are confluent provided their cyclic critical pairs have cyclic-joinable decreasing diagrams.

BibTeX - Entry

@InProceedings{liu_et_al:LIPIcs:2015:5429,
  author =	{Jiaxiang Liu and Jean-Pierre Jouannaud and Mizuhito Ogawa},
  title =	{{Confluence of Layered Rewrite Systems}},
  booktitle =	{24th EACSL Annual Conference on Computer Science Logic (CSL 2015)},
  pages =	{423--440},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-939897-90-3},
  ISSN =	{1868-8969},
  year =	{2015},
  volume =	{41},
  editor =	{Stephan Kreutzer},
  publisher =	{Schloss Dagstuhl--Leibniz-Zentrum fuer Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{http://drops.dagstuhl.de/opus/volltexte/2015/5429},
  URN =		{urn:nbn:de:0030-drops-54293},
  doi =		{10.4230/LIPIcs.CSL.2015.423},
  annote =	{Keywords: Layers, confluence, decreasing diagrams, critical pairs, cyclic unification}
}

Keywords: Layers, confluence, decreasing diagrams, critical pairs, cyclic unification
Collection: 24th EACSL Annual Conference on Computer Science Logic (CSL 2015)
Issue Date: 2015
Date of publication: 07.09.2015

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