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中国科学院大学学报 ›› 2026, Vol. 43 ›› Issue (3): 289-295.DOI: 10.7523/j.ucas.2023.052

• 数学与物理学 •    下一篇

具有分数阶非线性项的表面生长模型在Besov空间中解的局部存在性和唯一性

王庆恺, 吴刚()   

  1. 中国科学院大学数学科学学院,北京 100049
  • 收稿日期:2024-04-01 接受日期:2024-05-17 发布日期:2023-05-10
  • 通讯作者: 吴刚
  • 基金资助:
    国家自然科学基金(11771423)

Local existence and uniqueness in Besov spaces for the solution of a surface growth model with fractional power nonlinear term

Qingkai WANG, Gang WU()   

  1. School of Mathematical Sciences,University of Chinese Academy of Sciences,Beijing,100049,China
  • Received:2024-04-01 Accepted:2024-05-17 Published:2023-05-10
  • Contact: Gang WU

摘要:

研究初值为 h0 的如下一维四阶非线性方程的柯西问题:th+x4h+x2xhα=0,其中 α 是大于等于5的实数。通过对相应线性方程和非线性项的精细估计,结合Littlewood-Paley理论、双模方法以及压缩映射原理,在非齐次Besov空间中得到了方程的局部适定性结果。

关键词: 表面生长模型, 柯西问题, 适定性, Besov空间, Littlewood-Paley理论

Abstract:

In this paper, we study the Cauchy problem for the 4-th order nonlinear equation th+x4h+x2xhα=0 in one dimension for the initial data h0 where α5 and αR. Making use of some subtle estimates of the corresponding linear equation and the nonlinear term, Littlewood-Paley theory, two-norm method, and contraction mapping principle, we obtain the local well-posedness result in nonhomogeneous Besov spaces.

Key words: surface growth model, Cauchy problem, well-posedness, Besov spaces, Littlewood-Paley theory

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