𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Failure of a conjecture about context free languages

✍ Scribed by Joseph Ullian


Book ID
114036544
Publisher
Elsevier Science
Year
1966
Weight
230 KB
Volume
9
Category
Article
ISSN
0019-9958

No coin nor oath required. For personal study only.


πŸ“œ SIMILAR VOLUMES


Remarks about Commutative Context-Free L
✍ Juha Kortelainen πŸ“‚ Article πŸ“… 1998 πŸ› Elsevier Science 🌐 English βš– 205 KB

We prove that the complement of a commutative language L is context-free if the Parikh-map of L is a proper linear set. Some sharpenings to results considering the Fliess conjecture on commutative contextfree languages are given. A conjecture concerning commutative star languages is disproved by a c

Bracketed context-free languages
✍ Seymour Ginsburg; Michael A. Harrison πŸ“‚ Article πŸ“… 1967 πŸ› Elsevier Science 🌐 English βš– 1012 KB

A bracketed grammar is a context-free grammar in which indexed brackets are inserted around the right-hand sides of the rules. The language generated by a bracketed grammar is a bracketed language. An algebraic condition is given for one bracketed language to be a subset of another. The intersection