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   comp.compilers      Compiler construction, theory, etc. (Mod      2,753 messages   

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   Message 972 of 2,753   
   jianhua li to Mr Roberto   
   The complement of CFL is the subset of C   
   10 Jun 07 01:34:34   
   
   From: lijh_vc@yahoo.com.cn   
      
   Mr Roberto wrote:   
      
   >The complement of any context-sensitive language is   
   >context-sensitive.   
   >Hence the complement of any context-free language is   
   >context-sensitive.   
      
     We acknowledge the complement of CFL is CSL. But this language is   
   the subset of CSL or the full set of CSL ? I think the complement of   
   CFL is the subset of CSL. Otherwise, that means CSL can be expressed   
   by the complement of CFL. Is there any theoretical proving?   
      
      
       lijh   
      
      
      
      
      
      
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