Guglielmi, Alessio and Gundersen, Tom - Normalisation Control in Deep Inference via Atomic Flows

lmcs:1081 - Logical Methods in Computer Science, March 31, 2008, Volume 4, Issue 1
Normalisation Control in Deep Inference via Atomic Flows

Authors: Guglielmi, Alessio and Gundersen, Tom

We introduce `atomic flows': they are graphs obtained from derivations by tracing atom occurrences and forgetting the logical structure. We study simple manipulations of atomic flows that correspond to complex reductions on derivations. This allows us to prove, for propositional logic, a new and very general normalisation theorem, which contains cut elimination as a special case. We operate in deep inference, which is more general than other syntactic paradigms, and where normalisation is more difficult to control. We argue that atomic flows are a significant technical advance for normalisation theory, because 1) the technique they support is largely independent of syntax; 2) indeed, it is largely independent of logical inference rules; 3) they constitute a powerful geometric formalism, which is more intuitive than syntax.


Source : oai:arXiv.org:0709.1205
DOI : 10.2168/LMCS-4(1:9)2008
Volume: Volume 4, Issue 1
Published on: March 31, 2008
Submitted on: June 25, 2015
Keywords: Mathematics - Logic,Computer Science - Logic in Computer Science,F.4.1


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