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  • Besides derivation and communication steps, a two-way PC grammar system can make a reduction step during which it reduces the right-hand side of a context-free production to its left hand-side. This paper proves that every non-unary recursively enumerable language is defined by a centralized two-way grammar system, Γ, with three components in a very economical way. Indeed, Γ?s master has only three nonterminals and one communication production; furthermore, it produces all sentential fforms with no more than two occurrences of nonterminals. In addition, during every computation, Γ makes a single communication step. Some variants of two-way PC grammar system are discussed in the conclusion of this paper.
  • Besides derivation and communication steps, a two-way PC grammar system can make a reduction step during which it reduces the right-hand side of a context-free production to its left hand-side. This paper proves that every non-unary recursively enumerable language is defined by a centralized two-way grammar system, Γ, with three components in a very economical way. Indeed, Γ?s master has only three nonterminals and one communication production; furthermore, it produces all sentential fforms with no more than two occurrences of nonterminals. In addition, during every computation, Γ makes a single communication step. Some variants of two-way PC grammar system are discussed in the conclusion of this paper. (en)
  • Kromě derivačních a komunikačních kroků může dvousměrný PC gramatický systém vykonávat kroky redukční během nichž nahradí pravou stranu bezkontextového pravidla stranou levou. Článek dokazuje, že každý neunární rekurzivně spočetný jazyk je definován úsporným způsobem pomocí centralizovaného dvousměrného PC gramatického systému, Γ, který má tři komponenty. Hlavní komponenta obsahuje pouze tři nonterminály a jediné praviddlo obsahující komunikační symbol; dále všechny generované větné formy neobssahují více než dva výskyty nonterminálních symbolů. Během každého výpočtu provede Γ jediný komunikační krok. Na závěr článku jsou diskutovány některé varianty těchto systémů. (cs)
Title
  • A Two-Way PC Grammar Systems Based on Regular Grammars
  • A Two-Way PC Grammar Systems Based on Regular Grammars (en)
  • Dvousměrné PC gramatické systémy založené na regulárních gramatikách (cs)
skos:prefLabel
  • A Two-Way PC Grammar Systems Based on Regular Grammars
  • A Two-Way PC Grammar Systems Based on Regular Grammars (en)
  • Dvousměrné PC gramatické systémy založené na regulárních gramatikách (cs)
skos:notation
  • RIV/00216305:26230/04:PU49114!RIV06-GA0-26230___
http://linked.open.../vavai/riv/strany
  • 252-256
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(GA201/04/0441)
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 553253
http://linked.open...ai/riv/idVysledku
  • RIV/00216305:26230/04:PU49114
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • Context-free grammar, left-linear grammar, right-linear grammar, grammar system, communication step, two-way PC grammar systems, derivation, production, sentential form, nonterminal, terminal (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...ontrolniKodProRIV
  • [16AD0FCA17A9]
http://linked.open...v/mistoKonaniAkce
  • Brno
http://linked.open...i/riv/mistoVydani
  • Brno
http://linked.open...i/riv/nazevZdroje
  • Proceedings of 10th Conference and Competition STUDENT EEICT 2004
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...iv/tvurceVysledku
  • Kaláb, Petr
http://linked.open...vavai/riv/typAkce
http://linked.open.../riv/zahajeniAkce
number of pages
http://purl.org/ne...btex#hasPublisher
  • Vysoké učení technické v Brně. Fakulta informačních technologií
https://schema.org/isbn
  • 80-214-2635-7
http://localhost/t...ganizacniJednotka
  • 26230
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