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Remarks on Jurdzinski and Lorys' proof that palindromes are not a Church-Rosser language

Authors
  • Dunlaing, Colm O.
  • Schluter, Natalie
Type
Preprint
Publication Date
Oct 25, 2007
Submission Date
Oct 24, 2007
Source
arXiv
License
Unknown
External links

Abstract

In 2002 Jurdzinski and Lorys settled a long-standing conjecture that palindromes are not a Church-Rosser language. Their proof required a sophisticated theory about computation graphs of 2-stack automata. We present their proof in terms of 1-tape Turing machines.We also provide an alternative proof of Buntrock and Otto's result that the set of non-square bitstrings, which is context-free, is not Church-Rosser.

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