I\'m stuck at solving this exercise, and I don\'t know where to begin: A language B 开发者_StackOverflowis Context Free; a language C is a subset of B: is C Context Free? Prove or disprove.
Considering following grammar in EBNF: h开发者_StackOverflowttp://pauillac.inria.fr/cdrom_a_graver/www/bigloo/manual/r5rs-8.html
I would like to know how to do regex, or context free grammers in F#. I have some experience with F#, (I\'ve never seen/used Active patterns, (it was explictly left out of the course i did for timeco
Let\'s say I have the following grammar: Expr -> Expr plus Expr(1) |Expr minus Expr (2) |num(3) When doing a left-most-derivation, after \"expanding\" Expr, how should one know what production t
While creating a first set for a given grammar, I noticed a scenario not described in my reference for the algorithm.
From this wikipedia page: The fundamental difference between context-free grammars and parsing expression grammars is that the PEG\'s
If I have a Context-Free Grammar G such that the language of G is nil, is G decidable? I know the answer is yes, but I am having trouble proving this. My first thought is to say there is only one sta
Assume E = {a, b}. Let L0 = {(b^(n))(a^(2n)) : n >= 0}. Let L = ((NOT OPERATION)L0) Is L regular, context-free but not regular, or not c开发者_如何学Context-free? Prove your answer.
I\'ve been working on this for about 5 hours for homework and I was hoping some of you guys might be able to help since CFG\'s are a huge part of CS.
//complete start ::= template. //template template ::= template_elements. template ::= template template_elements.
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