Partial orders on words, minimal elements of regular languages, and state complexity
Theoretical Computer Science
Numeration systems, linear recurrences, and regular sets
Information and Computation
On a conjecture about slender context-free languages
Theoretical Computer Science
Discrete Applied Mathematics
The set of minimal words of a context-free language is context-free
Journal of Computer and System Sciences
On lengths of words in context-free languages
Theoretical Computer Science
Generalization of automatic sequences for numeration systems on a regular language
Theoretical Computer Science
Automatic Sequences: Theory, Applications, Generalizations
Automatic Sequences: Theory, Applications, Generalizations
Operations preserving regular languages
Theoretical Computer Science - Foundations of computation theory (FCT 2003)
Introduction to Automata Theory, Languages, and Computation (3rd Edition)
Introduction to Automata Theory, Languages, and Computation (3rd Edition)
LATA'11 Proceedings of the 5th international conference on Language and automata theory and applications
State complexity of the concatenation of regular tree languages
Theoretical Computer Science
Hi-index | 5.23 |
Let the words of a language L be arranged in increasing radix order: L={w"0,w"1,w"2,...}. We consider transformations that extract terms from L in an arithmetic progression. For example, two such transformations are even(L)={w"0,w"2,w"4...} and odd(L)={w"1,w"3,w"5,...}. Lecomte and Rigo observed that if L is regular, then so are even(L), odd(L), and analogous transformations of L. We find good upper and lower bounds on the state complexity of this transformation. We also give an example of a context-free language L such that even(L) is not context-free.