Sharp extinction rates for positive solutions of fast diffusion equations

Tobias König, Meng Yu

Let $s\in (0,1]$ and $N>2s$. It is known that positive solutions to the (fractional) fast diffusion equation ${\partial }_{t}u+(-\Delta {)}^s(u^{\frac{N-2s}{N+2s}})=0$ on $(0, \infty) \…