Comment #3 on issue 2213 by drunkiri...@gmail.com: Derivative of Sum http://code.google.com/p/sympy/issues/detail?id=2213
For infinite sums you need to check for uniform convergence of the function series... definitely not a trivial task.
I'm taking this up for the finite case. -- You received this message because you are subscribed to the Google Groups "sympy-patches" group. To post to this group, send email to sympy-patches@googlegroups.com. To unsubscribe from this group, send email to sympy-patches+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sympy-patches?hl=en.
