Berstel, Jean Series rationnelles. (French) Zbl 0401.16001 Series formelles en variables non commutatives et applications, Actes 5ieme Ec. de Printemps d’Inf. theor., Vieux-Boucau les Bains 1977, 5-22 (1978). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 Document MSC: 16W60 Valuations, completions, formal power series and related constructions (associative rings and algebras) 16Y60 Semirings 68Q45 Formal languages and automata Keywords:Formal Power Series in Noncommuting Variables; Recognizable Formal Power Series PDF BibTeX XML