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Corrigendum to our paper: How Expressions Can Code for Automata

Published online by Cambridge University Press:  28 July 2010

Sylvain Lombardy  and
Jacques Sakarovitch
Sylvain Lombardy
Affiliation:
IGM-LabInfo (UMR 8049), Université Paris-Est Marne-la-Vallée, 77454 Marne-la-Vallée Cedex 2, France; lombardy@univ-mlv.fr.
Jacques Sakarovitch
Affiliation:
LTCI (UMR 5141), CNRS/Télécom ParisTech, 46 rue Barrault, 75634 Paris Cedex 13, France; sakarovitch@enst.fr.
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Abstract

In a previous paper, we have described the construction of an automaton from a rational expression which has the property that the automaton built from an expression which is itself computed from a co-deterministic automaton by the state elimination method is co-deterministic. It turned out that the definition on which the construction is based was inappropriate, and thus the proof of the property was flawed. We give here the correct definition of the broken derived terms of an expression which allow to define the automaton and the detailed full proof of the property.

Keywords

Finite automataregular expressionderivation of expressionsquotient of automata.
Type
Research Article
Information
RAIRO - Theoretical Informatics and Applications , Volume 44 , Issue 3 , July 2010 , pp. 339 - 361
Copyright
© EDP Sciences, 2010

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References

P.-Y. Angrand, S. Lombardy and J. Sakarovitch, On the number of broken derived terms of a rational expression. J. Automata, Languages and Combinatorics, to appear.
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