Drop Problem 3.1!

I have dropped Problem 3.1 from the list of problems for this Thursday. The reason is that the problem is not well-posed with the background we have: If the definition of the measure nu is to make sense, the integral on the right hand side has to be interpreted as a Lebesgue integral and not as a Riemann integral, and we have not developed Lebesgue integration (if you happen to know Lebesgue integration, the problem is doable).