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Information Processing Letters 111, 23-24 (2011) 1096-1098
On the supports of recognizable series over a field and a sinlge letter alphabet
Guillaume Chapuy 1, Ines Klimann 1
(15/12/2011)

We prove that the support of a recognizable series over a field of characteristic zero and a single letter alphabet is recognizable. This provides an answer to a question of Kirsten (2009). Then we give an example of a recognizable series over a field of prime characteristic and a single letter alphabet whose support is not recognizable which provides an answer to a question of Kirsten and Quaas (2011).
1 :  Laboratoire d'informatique Algorithmique : Fondements et Applications (LIAFA)
CNRS : UMR7089 – Université Paris VII - Paris Diderot
Informatique/Théorie et langage formel
* Formal languages – * Recognizable series – * Support of series
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