On Sat, Jun 4, 2011 at 1:44 AM, Gilbert gede <gilbertg...@gmail.com> wrote: > Right now, I made a timevaryingsymbol class; it's diff is indeed > rewritten and works. The problem is once you put that inside an add > or mul, it's diff method no longer gets called.
I think this can be solved overloading the free_symbols method in your class, making it always include the time variable, besides itself. Renato -- You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to sympy@googlegroups.com. To unsubscribe from this group, send email to sympy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sympy?hl=en.
