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A non-learnable class of E-pattern languages

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journal contribution
posted on 2008-07-03, 16:01 authored by Daniel Reidenbach
We investigate the inferrability of E-pattern languages (also known as extended or erasing pattern languages) from positive data in Gold’s learning model. As the main result, our analysis yields a negative outcome for the full class of E-pattern languages – and even for the subclass of terminal-free E-pattern languages – if the corresponding terminal alphabet consists of exactly two distinct letters. Furthermore, we present a positive result for a manifest subclass of terminal-free E-pattern languages. We point out that the considered problems are closely related to fundamental questions concerning the nondeterminism of E-pattern languages.

History

School

  • Science

Department

  • Computer Science

Citation

REIDENBACH, D., 2006. A non-learnable class of E-pattern languages. Theoretical Computer Science, 350 (1), pp. 91-102

Publisher

© Elsevier

Publication date

2006

Notes

This is a journal article. It was published in the journal, Theoretical Computer Science [© Elsevier]. The definitive version is available at: doi:10.1016/j.tcs.2005.10.017

ISSN

0304-3975

Language

  • en

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