### Abstract

We unify two distinct methods of the global analysis for the nonlinear Schrödinger equations, namely those in the Sobolev spaces and in the weighted spaces. Thus we can deal with various sums of power nonlinearies |u|^{p-1} u for 1 + 2/n < p < ∞, since the former works for p ≥ 1 + 4/N, while the latter for 1 + 2/n < p < 1 + 4/n. Even for a single power, our result is much simpler and slightly better than the previous ones as to restriction on the initial data. Moreover, we extend the result to the maximal regularity, thereby obtaining scattering at the lower critical value p = 1 + 8/ (√n^{2} + 4n + 36 + n + 2) for n ≥ 4. We also show the asymptotic completeness in FH^{1} without smallness for p ≥ l+8/( √ n^{2} + 12n + 4+n-2) and any n ∈ ℕ.

Original language | English |
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Pages (from-to) | 45-68 |

Number of pages | 24 |

Journal | Nonlinear Differential Equations and Applications |

Volume | 9 |

Issue number | 1 |

DOIs | |

Publication status | Published - 2002 |

Externally published | Yes |

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### Keywords

- Global existence
- Lorentz spaces
- Nonlinear Schrödinger equation
- Scattering
- Strichartz estimate

### ASJC Scopus subject areas

- Analysis
- Applied Mathematics