Episturmian words and some constructions of de Luca and Rauzy
Theoretical Computer Science
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European Journal of Combinatorics
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LATA '09 Proceedings of the 3rd International Conference on Language and Automata Theory and Applications
Characteristic morphisms of generalized episturmian words
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Theoretical Computer Science
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We focus on Θ-rich and almost Θ-rich words over a finite alphabet A, where Θ is an involutive antimorphism over A*. We show that any recurrent almost Θ-rich word u is an image of a recurrent Θ′-rich word under a suitable morphism, where Θ′ is again an involutive antimorphism. Moreover, if the word u is uniformly recurrent, we show that Θ′ can be set to the reversal mapping. We also treat one special case of almost Θ-rich words. We show that every Θ-standard word with seed is an image of an Arnoux-Rauzy word.