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Lookup NU author(s): Dr Victor Khomenko
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We show that the problems of checking pi-Calculus structural congruence (piSC) and graph isomorphism (GI) are Karp reducible to each other. The reduction from GI to piSC is given explicitly, and the reduction in the opposite direction proceeds by transforming piSC into an instance of the term equality problem (i.e. the problem of deciding equivalence of two terms in the presence of associative and/or commutative operations and commutative variable-binding quantifiers), which is known to be Karp reducible to GI. Our result is robust in the sense that it holds for several variants of structural congruence and some rather restrictive fragments of pi-Calculus. Furthermore, we address the question of solving piSC in practice, and describe a number of optimisations exploiting specific features of pi-Calculus terms, which allow one to significantly reduce the size of the resulting graphs that have to be checked for isomorphism.
Author(s): Khomenko V, Meyer R
Editor(s): Edwards, S., Lorenz, R., Vogler, W.
Publication type: Conference Proceedings (inc. Abstract)
Publication status: Published
Conference Name: 9th International Conference on Application of Concurrency to System Design (ACSD)
Year of Conference: 2009
Publisher: IEEE Computer Society
Notes: ACSD 2009.
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