Issue |
RAIRO-Theor. Inf. Appl.
Volume 33, Number 2, March April 1999
|
|
---|---|---|
Page(s) | 117 - 124 | |
DOI | https://doi.org/10.1051/ita:1999109 | |
Published online | 15 August 2002 |
Undecidability of the equivalence of finite substitutions on regular language
1
Turku Centre for Computer Science TUCS, Lemminkäisenkatu 14 A,
FIN-20520 Turku, Finland; vehalava@cs.utu.fi.
2
Department of Mathematics,
University of Turku,
FIN-20014 Turku, Finland; harju@utu.fi.
Received:
February
1998
Accepted:
December
1998
A simplified proof is given for the following result due to Lisovik: it is undecidable for two given ε–free finite substitutions, whether they are equivalent on the regular language b{0,1}*c.
© EDP Sciences, 1999
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