Parsing theory. Vol. 1: languages and parsing
Parsing theory. Vol. 1: languages and parsing
Characterizations of Pushdown Machines in Terms of Time-Bounded Computers
Journal of the ACM (JACM)
Journal of the ACM (JACM)
Pebbling Moutain Ranges and its Application of DCFL-Recognition
Proceedings of the 7th Colloquium on Automata, Languages and Programming
STOC '04 Proceedings of the thirty-sixth annual ACM symposium on Theory of computing
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Visibly pushdown languages form a subclass of the context-free languages which is appealing because of its nice algorithmic and closure properties. Here we show that the emptiness problem for this class is not any easier than the emptiness problem for context-free languages, namely hard for deterministic polynomial time. The proof consists of a reduction from the alternating graph reachability problem.