Original Article

Acta Informatica

, Volume 48, Issue 1, pp 19-24

First online:

A characterization of rational D0L power series

  • Juha HonkalaAffiliated withDepartment of Mathematics, University of Turku Email author 

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We study D0L power series over an arbitrary field. We characterize those D0L power series which are also rational series. As a consequence we show that rationality is decidable for D0L power series over many fields.