Growth of groups and diffeomorphisms of the interval
  We prove that the so called Grigorchuk-Maki group of intermadiate growth can be seen as a group of $C^1$ diffeomorphisms of the interval. On the other hand, we prove that every group of $C^{1+\alpha}$ diffeomorphisms of the interval having subexponential growth is almost nilpotent. 
Andr\'es Navas