A Continuum of Extinction Rates for the Fast Diffusion Equation

Marek Fila, Juan Luis Vazquez, Michael Winkler

We find a continuum of extinction rates for solutions $u(y,\tau )\ge 0$ of the fast diffusion equation $u_{\tau }=\Delta u^m$ in a subrange of exponents $m\in (0,1)$. The equation is posed in $\re…