Finite mass self-similar blowing-up solutions of a chemotaxis system with non-linear diffusion

Details Finite mass self-similar blowing-up solutions of a chemotaxis system with non-linear diffusion Finite mass self-similar blowing-up solutions of a chemotaxis system with non-linear diffusion

2009-11-04

arxiv.org/abs/0911.0835v1

Mathematics

Analysis of PDEs

Scientific paper

For a specific choice of the diffusion, the parabolic-elliptic Patlak-Keller-Segel system with non-linear diffusion (also referred to as the quasi-linear Smoluchowski-Poisson equation) exhibits an interesting threshold phenomenon: there is a critical mass $M_c>0$ such that all the solutions with initial data of mass smaller or equal to $M_c$ exist globally while the solution blows up in finite time for a large class of initial data with mass greater than $M_c$. Unlike in space dimension 2, finite mass self-similar blowing-up solutions are shown to exist in space dimension $d?3$.

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