The equation is, given to me by lurflurf,:
mv' + f(v ) + s(u) = F(t), t > 0, u(0) = U0, v (0) = V0
where v=u'
For the record the equation was:
mu'' + f(u' ) + s(u) = F(t), t > 0, u(0) = U0, u' (0) = V0 .

Re: Python, RukgeKutta and first-order differential equation system.

Here is the page with the exercises: http://www.ifi.uio.no/~inf1100/ODE_project.pdf" [Broken]

The equation is given in 11.36 and it is 11.37 I need help with.
The solution is http://www.ifi.uio.no/~inf1100/live-programming/oscillator_v1.py" [Broken]