Mathematics – Analysis of PDEs
Scientific paper
2008-12-29
Journal of Mathematical Analysis and applications 361, 2 (2008) 533-542
Mathematics
Analysis of PDEs
Scientific paper
10.1016/j.jmaa.2009.07.034
The Keller-Segel system describes the collective motion of cells that are attracted by a chemical substance and are able to emit it. In its simplest form, it is a conservative drift-diffusion equation for the cell density coupled to an elliptic equation for the chemo-attractant concentration. This paper deals with the rate of convergence towards a unique stationary state in self-similar variables, which describes the intermediate asymptotics of the solutions in the original variables. Although it is known that solutions globally exist for any mass less $8\pi $, a smaller mass condition is needed in our approach for proving an exponential rate of convergence in self-similar variables.
Blanchet Adrien
Dolbeault Jean
Escobedo Miguel
Fernandez Javier
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