Blow-up behavior of solutions to a degenerate parabolic–parabolic Keller–Segel system

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• 作者：Kazuhiro Ishige ; Philippe Laurençot ; Noriko Mizoguchi
• 关键词：Mathematics Subject Classification35B44 ; 35K51 ; 35K65
• 刊名：Mathematische Annalen
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：367
• 期：1-2
• 页码：461-499
• 全文大小：
• 刊物类别：Mathematics and Statistics
• 刊物主题：Mathematics, general;
• 出版者：Springer Berlin Heidelberg
• ISSN：1432-1807
• 卷排序：367

文摘

Qualitative properties of solutions blowing up in finite time are obtained for a degenerate parabolic–parabolic Keller–Segel system, the nonlinear diffusion being of porous medium type with an exponent smaller or equal to the critical one \(m_c:=2(N-1)/N\). In both cases, it is shown that only type II blow-up is possible, that is, blow-up at the same rate as backward self-similar solutions never occurs. Further information on the generation of singularities induced by mass concentration are given in the critical case.