Sharp rates of decay of solutions to the nonlinear fast diffusion equation via functional inequalities

Details Sharp rates of decay of solutions to the nonlinear fast diffusion equation via functional inequalities Sharp rates of decay of solutions to the nonlinear fast diffusion equation via functional inequalities

2009-07-17

arxiv.org/abs/0907.2986v1

Mathematics

Analysis of PDEs

Scientific paper

The goal of this note is to state the optimal decay rate for solutions of the nonlinear fast diffusion equation and, in self-similar variables, the optimal convergence rates to Barenblatt self-similar profiles and their generalizations. It relies on the identification of the optimal constants in some related Hardy-Poincar\'e inequalities and concludes a long series of papers devoted to generalized entropies, functional inequalities and rates for nonlinear diffusion equations.

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