From: fateman@cs.berkeley.edu   
      
   On 12/10/2017 10:28 AM, clicliclic@freenet.de wrote:   
   > The next step should be to debug the utility functions   
      
   As I recall, I parsed and executed the algebraic integral rules into   
   lisp, and could solve many integrals, but ran out of steam because   
   what you call "utility functions" can in principle include any   
   functionality available to the matching programs.   
      
   Which means, in principle, all of Mathematica.  To the extent that   
   my lisp system or someone else's sympy fails to mimic every   
   Mathematica "utility" in the way expected by Rubi,   
   the ruleset may not provide the correct   
   answer.  Or in the tests I ran years ago, might fail to converge   
   on some examples.   
      
   Just a caution.   
      
   RJF   
      
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