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Detecting Useless Transitions in Pushdown Automata (1306.1947v1)
Published 8 Jun 2013 in cs.FL
Abstract: Pushdown automata may contain transitions that are never used in any accepting run of the automaton. We present an algorithm for detecting such useless transitions. A finite automaton that captures the possible stack content during runs of the pushdown automaton, is first constructed in a forward procedure to determine which transitions are reachable, and then employed in a backward procedure to determine which of these transitions can lead to a final stat
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