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I need help with this problem. I proved that $L$ is not context free (using Ogden's lemma), but I can't prove that $\overline{L}$ is context free. I'm thinking about a proof by cases (if $\#(a)=\#(b) \neq \#(c)$ or something else) but the proof could be so extensive.


marked as duplicate by Yuval Filmus, David Richerby, Raphael Feb 16 '16 at 23:50

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  • $\begingroup$ Has been asked before many times. $\endgroup$ – Yuval Filmus Feb 16 '16 at 23:04

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