Dear all, I am interested in doing a small thing (perhaps).
I wish to have an 'indexed function' The purpose would be to have something like ************** f = symbols('f', cls=IndexedFunction) i = Idx('i') print diff(f[i](x),x) ************** I cannot compute derivatives if the dependency to x is not provided. 1) Can it be done ? 2) Is this a proper way to asses derivatives of vector/tensor fields and associated derivatives ? Thanks in advance for your help. -- 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 sympy+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at http://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/edb80c92-f0e9-4cab-ac39-18a239c9a650%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.