数学物理学报 ›› 2026, Vol. 46 ›› Issue (5): 1751-1768.

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有界域上四阶 Cahn-Hilliard 方程在二重特征值处的定态分歧

廖睿琳(), 管芳(), 潘志刚*()   

  1. 西南交通大学数学学院 成都 611756
  • 收稿日期:2025-04-27 修回日期:2025-10-21 出版日期:2026-10-26 发布日期:2026-09-07
  • 通讯作者: 潘志刚 E-mail:liaorl02@126.com;15528026689@163.com;panzhigang@home.swjtu.edu.cn
  • 作者简介:廖睿琳, E-mail:liaorl02@126.com;
    管芳, E-mail:15528026689@163.com
  • 基金资助:
    国家自然科学基金(11901408);国家自然科学基金(7251223);四川省自然科学青年基金(22NSFSC16338);中央高校理科创新培育项目(2682026CX185)

Steady-State Bifurcation From Double Eigenvalue for the Fourth-Order Cahn-Hilliard Equation on a Bounded Domain

Ruilin Liao(), Fang Guan(), Zhigang Pan*()   

  1. School of Mathematics, Southwest Jiaotong University, Chengdu 611756
  • Received:2025-04-27 Revised:2025-10-21 Online:2026-10-26 Published:2026-09-07
  • Contact: Zhigang Pan E-mail:liaorl02@126.com;15528026689@163.com;panzhigang@home.swjtu.edu.cn
  • Supported by:
    NSFC(11901408);NSFC(7251223);Sichuan Provincial Natural Science Youth Fund(22NSFSC16338);Central University Basic Research Innovation Project(2682026CX185)

摘要:

该文运用规范化的 Lyapunov-Schmidt 约化方法和线性全连续场谱分解定理, 研究 Cahn-Hilliard 方程的定态分歧. 在正方形有界域上, 作者证明了四阶 Cahn-Hilliard 方程在齐次 Dirichlet 边界条件下和齐次 Robin 边界条件下在第一特征值 (二重) 处发生定态分歧, 此时 Cahn-Hilliard 方程有非平凡解, 并得到了两类边界条件下产生超临界分歧和次临界分歧的完整判据、分歧解的具体表达式、正则性以及分歧解图.

关键词: Cahn-Hilliard 方程, Dirichlet 边界, Robin 边界, 线性全连续场, Lyapunov-Schmidt 约化

Abstract:

Employing the normalized Lyapunov-Schmidt reduction method and the spectral decomposition theorem for linear completely continuous fields to investigate the steady-state bifurcation of the Cahn-Hilliard equation. On a square bounded domain, we prove that the fourth-order Cahn-Hilliard equation undergoes steady-state bifurcation at the first eigenvalue (double) under homogeneous Dirichlet boundary conditions and homogeneous Robin boundary conditions. In such cases, the Cahn-Hilliard equation admits nontrivial solutions. Furthermore, the complete criteria for supercritical and subcritical bifurcations under both boundary conditions, explicit expressions for the bifurcation solutions, regularity of bifurcation solutions and the bifurcation solutions' diagrams were obtained.

Key words: Cahn-Hilliard equation, Dirichlet boundary, Robin boundary, linear completely continuous fields, Lyapunov-Schmidt reduction

中图分类号: 

  • O175.29