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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
A Restriction of Sentetial Forms of of Scattered Context Grammars
 Šimáček, Jiří ; Masopust, Tomáš (referee) ; Meduna, Alexandr (advisor)
This work introduces and discusses generalized scattered context grammars that are based upon sequences of productions whose left-hand sides are formed by nonterminal strings, not just single nonterminals. It places two restrictions on the derivations in these grammars. More specifically, let k be a constant. The first restriction requires that rewriting all symbols occurs within the first k symbols of the first continuous block of nonterminals in the sentential form during every derivation step. The other restriction defines the derivations over sentential forms containing no more than k occurrences of nonterminals. As its main result, the thesis demonstrates that both restrictions decrease the generative power of these grammars to the power of context-free grammars.
Detailed record
A Restriction of Sentetial Forms of of Scattered Context Grammars
 Šimáček, Jiří ; Masopust, Tomáš (referee) ; Meduna, Alexandr (advisor)
This work introduces and discusses generalized scattered context grammars that are based upon sequences of productions whose left-hand sides are formed by nonterminal strings, not just single nonterminals. It places two restrictions on the derivations in these grammars. More specifically, let k be a constant. The first restriction requires that rewriting all symbols occurs within the first k symbols of the first continuous block of nonterminals in the sentential form during every derivation step. The other restriction defines the derivations over sentential forms containing no more than k occurrences of nonterminals. As its main result, the thesis demonstrates that both restrictions decrease the generative power of these grammars to the power of context-free grammars.
Detailed record

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