Geodesic
Tree-controlled grammars with restrictions placed upon cuts and paths
Kybernetika, Tome 48 (2012) no. 1, pp. 165-175.

Voir la notice de l'article provenant de la source Czech Digital Mathematics Library

First, this paper discusses tree-controlled grammars with root-to-leaf derivation-tree paths restricted by control languages. It demonstrates that if the control languages are regular, these grammars generate the family of context-free languages. Then, in a similar way, the paper introduces tree-controlled grammars with derivation-tree cuts restricted by control languages. It proves that if the cuts are restricted by regular languages, these grammars generate the family of recursively enumerable languages. In addition, it places a binary-relation-based restriction upon these grammars and demonstrate that this additional restriction does not affect the generative power of these grammars.
Classification : 68Q42
Keywords: context-free grammars; tree-controlled grammars; restricted derivation trees; paths; cuts; language families 
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     author = {Koutn\'y, Ji\v{r}{\'\i} and Meduna, Alexander},
     title = {Tree-controlled grammars with restrictions placed upon cuts and paths},
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     pages = {165--175},
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     volume = {48},
     number = {1},
     year = {2012},
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     zbl = {1260.68195},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_2012__48_1_a9/}
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Koutný, Jiří; Meduna, Alexander. Tree-controlled grammars with restrictions placed upon cuts and paths. Kybernetika, Tome 48 (2012) no. 1, pp. 165-175. http://geodesic.mathdoc.fr/item/KYB_2012__48_1_a9/