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Geometrically Closed Positive Varieties of Star-Free Languages
A recently introduced operation of geometrical closure on formal languages is investigated. It is proved that the geometrical closure of a language from the positive variety [Formula: see text], the level 3/2 of the Straubing-Thérien hierarchy of star-free languages, always falls into the variety [F...
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| Publicado no: | Language and Automata Theory and Applications |
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| Main Authors: | , |
| Formato: | Artigo |
| Idioma: | Inglês |
| Publicado em: |
2020
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| Assuntos: | |
| Acesso em linha: | https://ncbi.nlm.nih.gov/pmc/articles/PMC7206645/ https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1007/978-3-030-40608-0_23 |
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