Publication detail

Cooperating Distributed Grammar Systems with Permitting Grammars as Components

CSUHAJ-VARJÚ, E. MASOPUST, T. VASZIL, G.

Original Title

Cooperating Distributed Grammar Systems with Permitting Grammars as Components

Type

journal article - other

Language

English

Original Abstract

This paper studies cooperating distributed grammar systems working in the terminal derivation mode where the components are variants of permitting grammars. It proves that although the family of permitting languages is strictly included in the family of random context languages, the families of random context languages and languages generated by permitting cooperating distributed grammar systems in the above mentioned derivation mode coincide. Moreover, if the components are so-called left-permitting grammars, then cooperating distributed grammar systems in the terminal mode characterize the class of context-sensitive languages, or if erasing rules are allowed, the class of recursively enumerable languages. Descriptional complexity results are also presented. It is shown that the number of permitting components can be bounded, in the case of left-permitting components with erasing rules even together with the number of nonterminals.

Keywords

Cooperating distributed grammar systems, permitting grammars, left-permitting grammars, generative power.

Authors

CSUHAJ-VARJÚ, E.; MASOPUST, T.; VASZIL, G.

RIV year

2009

Released

12. 3. 2009

ISBN

1453-8245

Periodical

Romanian Journal of Information Science and Technology (ROMJIST)

Year of study

12

Number

2

State

Romania

Pages from

175

Pages to

189

Pages count

15

URL

http://www.imt.ro/romjist/

BibTex

@article{BUT47968,
  author="Erzsébet {Csuhaj-Varjú} and Tomáš {Masopust} and György {Vaszil}",
  title="Cooperating Distributed Grammar Systems with Permitting Grammars as Components",
  journal="Romanian Journal of Information Science and Technology (ROMJIST)",
  year="2009",
  volume="12",
  number="2",
  pages="175--189",
  issn="1453-8245",
  url="http://www.imt.ro/romjist/"
}