Oh I guess that first paper was the Fu et al. :) Aaron Meurer
On Mar 15, 2012, at 4:03 PM, Joachim Durchholz <[email protected]> wrote: > Am 14.03.2012 13:36, schrieb Alan Bromborsky: >> One of the current deficiencies of sympy is trig simplification. I have >> found the attached publication on such simplification. I have emailed >> the authors in an attempt to obtain the C# code they wrote to implement >> their system. If I can obtain the code my suggestion is for someone to >> convert it to python and integrate it into sympy. > > Huh. A paper that describes a system but remains vague about the concrete > heuristics that they were using, or how they arrived at the heuristics. Nor > do they say what textbook examples they tested it on, or how many examples > that were ("many"). Nor do they actually say how many examples their system > could solve, compared to Maple, Mathematica, etc. In other words, the paper > doesn't describe their approach well enough to verify their claim, and that > does ring an alarm bell. > > That said, their approach *could* work well. It's certainly worth a shot. > > Are there other approaches that could be considered? > A google search for "trigonometry simplification algorithm" (without the > quotes) turned up some links, of which I found the following interesting (but > haven't checked the quality of the papers): > > http://rfdz.ph-noe.ac.at/fileadmin/Mathematik_Uploads/ACDCA/DESTIME2006/DES_contribs/Fu/simplification.pdf > > http://stackoverflow.com/questions/4643935/open-source-trigonometric-equation-simplifiers-preferably-c-based > lists some possibly useful pages on the topic. > > HTH > > -- > You received this message because you are subscribed to the Google Groups > "sympy" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/sympy?hl=en. > -- You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/sympy?hl=en.
