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Six nonterminals are enough for generating each r.e. language by a matrix grammar - MaRDI portal

Six nonterminals are enough for generating each r.e. language by a matrix grammar (Q3347322)

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Six nonterminals are enough for generating each r.e. language by a matrix grammar
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    Six nonterminals are enough for generating each r.e. language by a matrix grammar (English)
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    1984
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    recursively enumerable language
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    context-free matrix grammar
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    appearance checking
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    programmed grammar
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    linear language
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    regular languages
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