Computer Science – Formal Languages and Automata Theory
Scientific paper
2011-09-28
Computer Science
Formal Languages and Automata Theory
This is the long version of a paper appearing in FSTTCS 2011
Scientific paper
We consider the master/slave parameterised reachability problem for networks of pushdown systems, where communication is via a global store using only non-atomic reads and writes. We show that the control-state reachability problem is decidable. As part of the result, we provide a constructive extension of a theorem by Ehrenfeucht and Rozenberg to produce an NFA equivalent to certain kinds of CFG. Finally, we show that the non-parameterised version is undecidable.
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