Computing Critical Pairs in 2-Dimensional Rewriting Systems

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Computing Critical Pairs in 2-Dimensional Rewriting Systems
Rewriting systems on words are very useful in the study of monoids. In good cases, they give finite presentations of the monoids, allowing their manipulation by a computer. Even better, when the presentation is confluent and terminating, they provide one with a notion of canonical representative for the elements of the presented monoid. Polygraphs are a higher-dimensional generalization of this notion of presentation, from the setting of monoids to the much more general setting of n-categories. Here, we are interested in proving confluence for polygraphs presenting 2-categories, which can be seen as a generalization of term rewriting systems. For this purpose, we propose an adaptation of the usual algorithm for computing critical pairs. Interestingly, this framework is much richer than term rewriting systems and requires the elaboration of a new theoretical framework for representing critical pairs, based on contexts in compact 2-categories. Term rewriting systems have proven very u...
Samuel Mimram
Added 16 Aug 2010
Updated 16 Aug 2010
Type Conference
Year 2010
Where RTA
Authors Samuel Mimram
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