On Tuesday, February 18, 2014 12:51:50 PM UTC+4, Christophe Bal wrote: > > Hello, > what is the origin of this name gruntz ? >
>From the name of algorithm author. > 2014-02-18 1:57 GMT+01:00 Aaron Meurer <[email protected] <javascript:>>: > >> Ah, so it seems that these incorrect limit heuristics have still not >> been completely abolished from the code base. I would recommend just >> using gruntz() for now. limit() is not that much smarter, but it does >> have a bad tendency to give wrong answers when gruntz() works just >> fine. >> >> Aaron Meurer >> >> On Mon, Feb 17, 2014 at 1:29 PM, Christophe Bal >> <[email protected]<javascript:>> >> wrote: >> > Thanks for this. >> > >> > >> > 2014-02-17 19:21 GMT+01:00 Avichal Dayal <[email protected]<javascript:> >> >: >> > >> >> However gruntz gives the correct result:- >> >> gruntz((x*exp(x)) / (exp(x)-1), x, -oo) gives 0 >> >> >> >> The part of code that is going wrong is already labeled as XXX: todo >> >> More specifically the following:- >> >> if abs(z0) is S.Infinity: >> >> # XXX todo: this should probably be stated in the >> >> # negative -- i.e. to exclude expressions that should >> >> # not be handled this way but I'm not sure what that >> >> # condition is; when ok is True it means that the leading >> >> # term approach is going to succeed (hopefully) >> >> >> >> It should exclude some expressions and I guess this is one of them. >> >> I'll try to understand and fix it. >> >> >> >> >> >> -- >> >> You received this message because you are subscribed to the Google >> Groups >> >> "sympy" group. >> >> To unsubscribe from this group and stop receiving emails from it, send >> an >> >> email to [email protected] <javascript:>. >> >> To post to this group, send email to [email protected]<javascript:> >> . >> >> Visit this group at http://groups.google.com/group/sympy. >> >> For more options, visit https://groups.google.com/groups/opt_out. >> > >> > >> > -- >> > You received this message because you are subscribed to the Google >> Groups >> > "sympy" group. >> > To unsubscribe from this group and stop receiving emails from it, send >> an >> > email to [email protected] <javascript:>. >> > To post to this group, send email to [email protected]<javascript:> >> . >> > Visit this group at http://groups.google.com/group/sympy. >> > For more options, visit https://groups.google.com/groups/opt_out. >> >> -- >> You received this message because you are subscribed to the Google Groups >> "sympy" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] <javascript:>. >> To post to this group, send email to [email protected] <javascript:> >> . >> Visit this group at http://groups.google.com/group/sympy. >> For more options, visit https://groups.google.com/groups/opt_out. >> > > -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sympy. For more options, visit https://groups.google.com/groups/opt_out.
