From: fateman@cs.berkeley.edu   
      
   On 8/5/2017 9:49 AM, bursejan@gmail.com wrote:   
   > Its not yet confirmed, [...].   
      
   I could not find the reference to this timing in the "pac" package,   
   though there is material that seems to be a gb()  program.   
   Is it possible to provide a more specific reference?   
      
   The program appears to use multi-dimensional arrays and   
   array indexing, features in SWI-Prolog.  SWI-Prolog also   
   provides other non-standard Prolog features, like linking   
   to C programs.   Once you are willing to add essentially   
   alien features to a "Prolog" system, many things become   
   easier, and this is probably natural if you are committed   
   to Prolog as part of your language syntax, but want to   
   make it "industrial strength".   
      
   I am going to guess that Bursejan's prolog (Jekejeke)   
   cannot run these programs without adding such   
   features from SWI-Prolog   
     and that is why this timing is "not yet confirmed".   
      
   Once you start adding features, as mentioned earlier,   
   you could simply call a conventionally-programmed CAS   
   and be done with it.   
      
   RJF   
      
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