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.
CITATION STYLE
Fratani, S., & Voundy, E. M. (2016). Homomorphic characterizations of indexed languages. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 9618, pp. 359–370). Springer Verlag. https://doi.org/10.1007/978-3-319-30000-9_28
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