Le dimanche 28 mars 2010 à 22:59 -0600, Aaron S. Meurer a écrit : > The None is essentially inert substitution, so maybe it should work like > Integral(f(x), x)(y). > I'd like to get the same syntax working for f(x).diff(x)(y) to mean f'(y) > (the derivative of f > evaluated at y) as per issue 1620.
You can't do that, f(x).diff(x) is an expression, not a function. If f(x) == 2*x, you are suggesting that Integer(2)(y) == 2 ?? I remain convinced that there's no consistent way of solving issue 1620 without issue 1688 (i.e. turning functions into sympy objects). -- You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to sy...@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.