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Rational stochastic languages
François Denis 1, Yann Esposito 1
(27/02/2006)

The goal of the present paper is to provide a systematic and comprehensive study of rational stochastic languages over a semiring K ∈{Q, Q +, R, R+}. A rational stochastic language is a probability distribution over a free monoid Σ∗ which is rational over K, that is which can be generated by a multiplicity automata with parameters in K. We study the relations between the classes of rational stochastic languages S rat K (Σ). We define the notion of residual of a stochastic language and we use it to investigate properties of several subclasses of rational stochastic languages. Lastly, we study the representation of rational stochastic languages by means of multiplicity automata.
1 :  Laboratoire d'informatique Fondamentale de Marseille (LIF)
CNRS : UMR6166 – Université de la Méditerranée - Aix-Marseille II – Université de Provence - Aix-Marseille I
Informatique/Apprentissage

Informatique/Informatique et langage
rational series – stochastic languages – multiplicity automata – probabilistic automata
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