g, ro, and gro, k are constants. On Jan 25, 6:52 pm, kcrisman <kcris...@gmail.com> wrote: > > I think it has to do with the lambda function causing this issue. > > Correct. Sage can only differentiate "symbolic" functions. Making > Bessel J functions symbolic ishttp://trac.sagemath.org/sage_trac/ticket/4102. > > You may want to look athttp://ask.sagemath.org/question/314/bessel-functions > for some really good ideas about how to work around this (or even to > contribute code for it!). > > Incidentally, what are g, ro, and gro? And k? Please try to include > whole code snippets, just in case there is something else going on to > cause an error. > > Good luck, > - kcrisman
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