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Consider L = {a^n b^n c^n |n ≥ 0}. Is L'(L Complement) a CFL? Prove it.
in Theory of Computation by (12 points) | 30 views

1 Answer

+1 vote

It is. It has been asked may times before on GO and SO.

Quick google search - https://cs.stackexchange.com/questions/41929/context-free-grammar-for-abc-an-bn-cn-mid-n-geq-0

by (1.9k points)
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Your link mentions a*b*c* - {a^n b^n c^n |n ≥ 0} which is not it's complement.
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I didn't say that was the solution - I meant to say google search will yield a million results for that sort of grammar.
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