Dear Mr. Zhang, we are using a differential operator as you need, please see more details on: http://stackoverflow.com/questions/15463412/matrix-of-differential-operators-in-python-module-sympy
We could address it without changing the core classes in Sympy only when the differential operator is used on the left side. When it is used on the right side the method __mul__ in the core class Expr had to be changed. We are still looking for a Sympy native solution, though. Regards On Friday, January 25, 2013 11:49:43 PM UTC+1, ruoyu zhang wrote: > > >>> p = DifferentialOperator(t) > >>> a * p * f(t) > Derivative(f(t), t)*a > > p is a DifferentialOperator, when it multiply with some expression at > right side, it calculates the derivative of the expression. > -- 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?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
