I see. How about then making simplify() call doit() on Subs() >>> simplify(x0*Derivative(f(x0, y0), y0) - x0*Subs(Derivative(f(x0, _xi_2), >>> _xi_2), (_xi_2,), (y0,))) nothing changes
>>> (x0*Derivative(f(x0, y0), y0) - x0*Subs(Derivative(f(x0, _xi_2), _xi_2), >>> (_xi_2,), (y0,))).doit() returns 0 as it should -- You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/sympy?hl=en.
