Dear all,
If someone could help me solve this mathematica NDSolve problem, that would be really nice. Here is a related, simpler problem to the one I am having. Suppose I want to solve the nonlinear ODE
\left(2 r + f(r) f'(r) \right) (1 + f'(r)^2) + r f(r) f''(r) = 0
subject to the...