On Sat, Jun 4, 2011 at 12:49 AM, Aaron Meurer <asmeu...@gmail.com> wrote: > I don't understand. How is ∂x/∂t != dx/dt?
Sorry, I thought about one thing and wrote another. I was thinking something like L(v, x, t) = v**2/2 - x**2/2, then take dL/dt = v * v'(t) + x * x'(t), but ∂L/∂t = 0. I know one should explicit in a partial derivative which other variables are to be held constant, but this "convention" was used when I took classes on mechanics, and it really make things shorter to write -- and anyway, how woud you write (∂L/∂t)_{v, x} in sympy? 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.