yes, there is a bug. the terms should start.. - 1/(x-pi/2) + (x-pi/2)/3 + ....
On Saturday, June 7, 2014 9:02:19 PM UTC-7, Ondřej Čertík wrote: > > The series exists, and has the 1/x term in general, but it is missing > the shift by pi/2: > > http://www.wolframalpha.com/input/?i=tan%28x%29+series+at+x%3Dpi%2F2 > > So I think there is a bug. > > Ondrej > > On Sat, Jun 7, 2014 at 1:23 PM, Aaron Meurer <asme...@gmail.com > <javascript:>> wrote: > > I think what you're getting is a generalized Lambert series. Notice > > that one of the terms is 1/x. > > > > Aaron Meurer > > > > On Wed, Jun 4, 2014 at 11:01 AM, su225 <su225...@gmail.com <javascript:>> > wrote: > >> Hello. I'm new to sympy and took the tutorial today. But I noticed the > >> following error. I'm glad to contribute to this project. > >> Where can I get resources to learn more about the sympy? > >> > >> The following line produces erroneous output. > >> In [129]: tan(x).series(x,pi/2,10) > >> > >> I have attached the screenshot of the output > >> > >> tan(x) cannot be expanded about pi/2. > >> The idea is determining the interval of convergence. If the point > specified > >> for the expansion is out of this interval then throw an exception > telling > >> that the power series expansion doesn't exist about that point. > >> > >> Thanks. > >> > >> > >> -- > >> 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 sympy+un...@googlegroups.com <javascript:>. > >> To post to this group, send email to sy...@googlegroups.com > <javascript:>. > >> Visit this group at http://groups.google.com/group/sympy. > >> To view this discussion on the web visit > >> > https://groups.google.com/d/msgid/sympy/67a11e70-9e0f-4a8c-8078-66550de884a3%40googlegroups.com. > > > >> For more options, visit https://groups.google.com/d/optout. > > > > -- > > 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 sympy+un...@googlegroups.com <javascript:>. > > To post to this group, send email to sy...@googlegroups.com > <javascript:>. > > Visit this group at http://groups.google.com/group/sympy. > > To view this discussion on the web visit > https://groups.google.com/d/msgid/sympy/CAKgW%3D6%2BoGXHwKGzScS0BGVtaGes_3%3Diy%3DURfd7hdM8oyOhsP-A%40mail.gmail.com. > > > > For more options, visit https://groups.google.com/d/optout. > -- 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 sympy+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at http://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/385b842e-8f4e-40ed-b249-a727daf6106d%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
