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A Pumping Lemma for Collapsible Pushdown Graphs of Level 2

Author Alexander Kartzow



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Alexander Kartzow

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Alexander Kartzow. A Pumping Lemma for Collapsible Pushdown Graphs of Level 2. In Computer Science Logic (CSL'11) - 25th International Workshop/20th Annual Conference of the EACSL. Leibniz International Proceedings in Informatics (LIPIcs), Volume 12, pp. 322-336, Schloss Dagstuhl - Leibniz-Zentrum für Informatik (2011)
https://doi.org/10.4230/LIPIcs.CSL.2011.322

Abstract

We present a pumping lemma for the class of collapsible pushdown graphs of level 2. This pumping lemma even applies to epsilon-contractions of level 2 collapsible pushdown graphs. Our pumping lemma also improves the bounds of Hayashi's pumping lemma for indexed languages.
Keywords
  • collapsible pushdown graph
  • epsilon-contraction
  • pumping lemma

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