chomsky normal form

Fetched 2026-10-26 (cache).

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Noun

1. {{lb|en|computing theory}} A [[context-free grammar]] in which the right hand side of any production rule consists of either one terminal symbol or two non-terminal symbols.
2. {{lb|en|computing theory}} A context-free grammar in which the right hand side of any production rule consists of either one terminal symbol or two non-terminal symbols (neither of which is the start symbol) or the epsilon (i.e. null string) symbol, but only if the left hand side is the start symbol. (Note: this is the full-fledged version, whereas the previous definition may be said to be defining '''Chomsky reduced form'''.)

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