Stability for a GNS inequality and the Log-HLS inequality, with application to the critical mass Keller-Segel equation

Details Stability for a GNS inequality and the Log-HLS inequality, with application to the critical mass Keller-Segel equation Stability for a GNS inequality and the Log-HLS inequality, with application to the critical mass Keller-Segel equation

2011-07-29

arxiv.org/abs/1107.5976v1

Mathematics

Analysis of PDEs

Scientific paper

Starting from the quantitative stability result of Bianchi and Egnell for the 2-Sobolev inequality, we deduce several different stability results for a Gagliardo-Nirenberg-Sobolev inequality in the plane. Then, exploiting the connection between this inequality and a fast diffusion equation, we get a quantitative stability for the Log-HLS inequality. Finally, using all these estimates, we prove a quantitative convergence result for the critical mass Keller-Segel system.

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