Comment #3 on issue 1562 by asmeurer: Have trigsimp apply factor and Poly.cancel() to sin's and cos's http://code.google.com/p/sympy/issues/detail?id=1562
OK. As it stands, this is not impeding the coding on my project directly. dsolve() will just be unable to apply variation of parameters to that equation, but I have it applying simplify() and trigsimp() to the wronskian, so whenever they are improved, dsolve() will be improved as well. Also, I am going to implement undetermined coefficients, so the most common linear differential equations will not need to use variation of parameters. The one polynomial issue that is a bit of a show stopper for me is issue 1563. I would like for dsolve() to return RootOf's whenever the the roots of the characteristic equation of a linear differential equation with constant coefficients cannot be solved explicitly, but it is failing because I have code that runs has() on the solution and Poly().has() fails. See that issue. -- You received this message because you are listed in the owner or CC fields of this issue, or because you starred this issue. You may adjust your issue notification preferences at: http://code.google.com/hosting/settings --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sympy-issues" 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-issues?hl=en -~----------~----~----~----~------~----~------~--~---
