𝔖 Bobbio Scriptorium
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On some subclasses of the class of generable languages

✍ Scribed by Ivan Mezník


Book ID
107947440
Publisher
Elsevier Science
Year
1976
Tongue
English
Weight
635 KB
Volume
2
Category
Article
ISSN
0304-3975

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📜 SIMILAR VOLUMES


The inclusion problem for some subclasse
✍ Peter R.J. Asveld; Anton Nijholt 📂 Article 📅 2000 🏛 Elsevier Science 🌐 English ⚖ 131 KB

By a reduction to Post's Correspondence Problem we provide a direct proof of the known fact that the inclusion problem for unambiguous context-free grammars is undecidable. The argument or some straightforward modiÿcation also applies to some other subclasses of context-free languages such as linear

On some structural properties of a subcl
✍ Ivan Mezník 📂 Article 📅 1987 🏛 Elsevier Science 🌐 English ⚖ 239 KB

Communicated by A. Salomaa G languages form a subclass of the class of w-regular languages. The basic characterization of G languages as posets is presented and some semilattice structures of G languages are described.