グライバック正規形
出典:Wikipedia
出典:『Wikipedia』 (2011/03/14 06:51 UTC 版)
In computer science and formal language theory, a context-free grammar is in Greibach normal form if the right-hand sides of all productions start with a terminal symbol, optionally followed by some variables. A non-strict form allows one exception to this format restriction for allowing the empty word (epsilon, ε) to be a member of the described language. The normal form bears the name of Sheila Greibach.