Abstract.
For a symbol, #, and a string, x = a 1 a 2 ...a n - 1 a n , any string of the form # i a 1 # i a 2 # i...# i a n - 1 # i a n # i, where 0, is a coincidental #-extension of x. A language, K, is a coincidental #-extension of L if every string of K represents a coincidental extension of a string in L and the deletion of all #s in K results in L. This paper proves that for every recursively enumerable language, E, there exists a propagating scattered context language that represents a coincidental extension of E.
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Received: 31 October 2001 / 31 January 2003
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Meduna, A. Coincidental extension of scattered context languages. Acta Informatica 39, 307–314 (2003). https://doi.org/10.1007/s00236-003-0112-0
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DOI: https://doi.org/10.1007/s00236-003-0112-0