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CSR
2008
Springer
13 years 6 months ago
Logic and Rational Languages of Words Indexed by Linear Orderings
We prove that every rational language of words indexed by linear orderings is definable in monadic second-order logic. We also show that the converse is true for the class of langu...
Nicolas Bedon, Alexis Bès, Olivier Carton, ...
ICALP
1998
Springer
13 years 8 months ago
Bridges for Concatenation Hierarchies
In the seventies, several classification schemes for the rational languages were proposed, based on the alternate use of certain operators (union, complementation, product and star...
Jean-Eric Pin