We show that, in the case of context-free programmed grammars with appearance checking working under free derivations, three nonterminals are enough to generate every recursively enumerable language. This improves the previously published bound of eight for the nonterminal complexity of these gramma
โฆ LIBER โฆ
On the complexity of formal grammars
โ Scribed by Ronald V. Book
- Publisher
- Springer-Verlag
- Year
- 1978
- Tongue
- English
- Weight
- 597 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0001-5903
No coin nor oath required. For personal study only.
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