Sorry for the typo, the equation is -B(t)^2 + B'(t) +1 =0. And the picture is right. The problem still remains.
On Monday, April 4, 2022 at 12:46:04 AM UTC+1 Oscar wrote: > You have a sign mismatch in your equation (+-Bt). > > -- > Oscar > > On Sun, 3 Apr 2022 at 23:39, kang li <[email protected]> wrote: > >> There is an issue in the sympy.dsolve module. When I was trying to solve >> the ode: -B(t)^2 - B'(t) +1 =0. The proper result should be tanh(C_1 - t), >> while the given result is the 1/tanh(C_1 - t). >> >> I can help to solve this issue as a GSOC project if provided the >> permission from the community. I often use the sympy package, and I love it >> as it is a competitive alternative to the Wolfram Mathematica. >> >> And I am now a master's student at the Mathematical Institute, Oxford >> University. Before coming here, I possess a computer science undergraduate >> degree. Here is my Linkdin >> <https://www.linkedin.com/in/kang-li-84949a154/>. >> >> [image: IMG_7136.jpg] >> >> -- >> 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 view this discussion on the web visit >> https://groups.google.com/d/msgid/sympy/b9c1f6c8-c355-40cb-a049-7c95c8ba5118n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/sympy/b9c1f6c8-c355-40cb-a049-7c95c8ba5118n%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/sympy/73818bf1-c99d-49cf-abd6-45b8672a6990n%40googlegroups.com.
