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ENTCS
2006

Refining the Undecidability Border of Weak Bisimilarity

13 years 3 months ago
Refining the Undecidability Border of Weak Bisimilarity
Weak bisimilarity is one of the most studied behavioural equivalences. This equivalence is undecidable for pushdown processes (PDA), process algebras (PA), and multiset automata (MSA, also known as parallel pushdown processes, PPDA). Its decidability is an open question for basic process algebras (BPA) and basic parallel processes (BPP). We move the undecidability border towards these classes by showing that the equivalence remains undecidable for weakly extended versions of BPA and BPP. In fact, we show that the weak bisimulation equivalence problem is undecidable even for normed subclasses of BPA and BPP extended with a finite constraint system. Key words: weak bisimulation, infinite-state systems, decidability
Mojmír Kretínský, Vojtech Reh
Added 12 Dec 2010
Updated 12 Dec 2010
Type Journal
Year 2006
Where ENTCS
Authors Mojmír Kretínský, Vojtech Rehák, Jan Strejcek
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