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Abelian periods, partial words, and an extension of a theorem of Fine and Wilf

Francine Blanchet-SadriSean SimmonsAmelia TebbeAmy Veprauskas — 2013

RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications

Recently, Constantinescu and Ilie proved a variant of the well-known periodicity theorem of Fine and Wilf in the case of two relatively prime abelian periods and conjectured a result for the case of two non-relatively prime abelian periods. In this paper, we answer some open problems they suggested. We show that their conjecture is false but we give bounds, that depend on the two abelian periods, such that the conjecture is true for all words having length at least those bounds and show that some...

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