## 抄録

This paper deals with the fully parabolic 1d chemotaxis system with diffusion 1/(1 + u). We prove that the above mentioned nonlinearity, despite being a natural candidate, is not critical. It means that for such a diffusion any initial condition, independently on the magnitude of mass, generates the global-in-time solution. In view of our theorem one sees that the one-dimensional Keller-Segel system is essentially different from its higher-dimensional versions. In order to prove our theorem we establish a new Lyapunov-like functional associated to the system. The information we gain from our new functional (together with some estimates based on the well-known classical Lyapunov functional) turns out to be rich enough to establish global existence for the initial-boundary value problem.

本文言語 | English |
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ページ（範囲） | 2529-2540 |

ページ数 | 12 |

ジャーナル | Proceedings of the American Mathematical Society |

巻 | 146 |

号 | 6 |

DOI | |

出版ステータス | Published - 2018 |

外部発表 | はい |

## ASJC Scopus subject areas

- Mathematics(all)
- Applied Mathematics