Re: What is the complement of context free language?



jianhua li wrote:
In many text books, they say that the complememt of context free
language us not context free language . But they do not say the
complemet of CFL is context sensitive language or Recursively
enumerable language ? So what is the language of the complement of
context free language?

The complement of any context-sensitive language is context-sensitive.
Hence the complement of any context-free language is context-
sensitive.
All the best,

Roberto

.



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