Epsilon-reducible context-free languages and characterizations of indexed languages

Severine Fratani (1) , El Makki Voundy (1)

1 MOVE - Modélisation et Vérification

We study a family of context-free languages that reduce to ε in the free group and give several homomorphic characterizations of indexed languages relevant to that family.

Mots clés: context-free grammars; homomorphic characterizations; transductions; indexed languages

Domaines: Informatique et langage [cs.CL]

Severine Fratani, El Makki Voundy. Epsilon-reducible context-free languages and characterizations of indexed languages. Information and Computation, 2019, 269, pp.104444. ⟨10.1016/j.ic.2019.104444⟩. ⟨hal-02413392⟩