Is this languages REGULAR / CONTEXT FREE but not REG / Nothing?...

CFG for L={ a^n b^m : n <= m+3 , n,m>=0}...

Are there any languages such that they are proper subsets of each other and satisfy these conditions...

Is the language L = { a^n b^j : j ≤ n ≤ 2j − 1 } context-free?...

CFG for L = {a^mb^nc^k: k = m×n}...

In Context Free Grammer, do we replace all variable during a substitution? or can we apply substitut...

description of the language accepted by S->SS|bS|a...

What's the Context-Free grammar of this language :L= {a^n b^m c^p d^q / m+n=p+q where n,m,p,q &g...

Implementation of a context-free grammar for logical operators with parentheses...

Simplifying CFG: S -> SS | (S) | ε...

Is WW where W belongs to {a,b}* a context free language?...

What makes this example a context-free language rather than regular language?...

Is the given language a valid CFG?...

can i push two symbols to the stack of a pushdown automata?...

What is the result of this CFG?...

How to remove left recursion from A -> Aα | ε...

Context-Free Grammar of language {a^i b^j c^i}...

Is it possible for an ambiguous CFG convert into CNF and becomes unambiguous?...

Can extended Backus Naur Form (EBNF) describe an unordered set of values?...

CFG for language...

All the strings X2Y where X and Y are composed of 0s and 1s and X ≠ Y...

Provide a context-free grammar that generates odd length language {w = 0*1* : |w| is odd}...

Finding a context-free grammar for the given language...

Can regex be used to recognize any Context Free Language?...

CFG: Why is this grammar ambiguous?...

concatenation & union - regular and context free languages...

How to generate the FIRST set of this context-free grammar...

Defining a context-free grammar for a specific language...

CFG of Language which contains equal # of a's and b's...

Context Free Grammar Design...