Publication details
Bounded Number of Parallel Productions in Scattered Context Grammars with Three Nonterminals
| Authors | |
|---|---|
| Year of publication | 2010 |
| Type | Article in Periodical |
| Magazine / Source | Fundamenta Informaticae |
| MU Faculty or unit | |
| Citation | |
| Web | http://dx.doi.org/10.3233/FI-2010-258 |
| Field | Informatics |
| Keywords | Scattered context grammars, parallel productions, descriptional complexity, generative power |
| Description | Scattered context grammars with three nonterminals are known to be computationally complete. So far, however, it was an open problem whether the number of parallel productions can be bounded along with three nonterminals. In this paper, we prove that every recursively enumerable language is generated by a scattered context grammar with three nonterminals and five parallel productions, each of which simultaneously rewrites no more than nine nonterminals. |