## 摘要

We consider two problems in the asymptotic behavior of semilinear second order wave equations. First, we consider the Ḣ^{1}_{x} × L^{2}_{x} scattering theory for the energy log-subcritical wave equation u= |u|^{4}ug(|u|) in R^{1+3}, where g has logarithmic growth at 0. We discuss the solution with general (respectively spherically symmetric) initial data in the logarithmically weighted (respectively lower regularity) Sobolev space. We also include some observation about scattering in the energy subcritical case. The second problem studied involves the energy log-supercritical wave equation u = |u|^{4}u logα(2+|u|^{2}) for 0 < α ≤ 43 in R^{1+3}. We prove the same results of global existence and (Ḣ^{1}_{x}) Ḣ^{1}_{x})× H^{1}_{x} scattering for this equation with a slightly higher power of the logarithm factor in the nonlinearity than that allowed in previous work by Tao.

原文 | English |
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頁（從 - 到） | 1-24 |

頁數 | 24 |

期刊 | Analysis and PDE |

卷 | 6 |

發行號 | 1 |

DOIs | |

出版狀態 | Published - 2013 |

## All Science Journal Classification (ASJC) codes

- 分析
- 數值分析
- 應用數學