Best matching Barenblatt profiles are delayed
Analysis of PDEs
2015-06-22 v2
Abstract
The growth of the second moments of the solutions of fast diffusion equations is asymptotically governed by the behavior of self-similar solutions. However, at next order, there is a correction term which amounts to a delay depending on the nonlinearity and on a distance of the initial data to the set of self-similar Barenblatt solutions. This distance can be measured in terms of a relative entropy to the best matching Barenblatt profile. This best matching Barenblatt function determines a scale. In new variables based on this scale, which are given by a self-similar change of variables if and only if the initial datum is one of the Barenblatt profiles, the typical scale is monotone and has a li
Cite
@article{arxiv.1408.6781,
title = {Best matching Barenblatt profiles are delayed},
author = {Jean Dolbeault and Giuseppe Toscani},
journal= {arXiv preprint arXiv:1408.6781},
year = {2015}
}