Electron. J. Differential Equations, Vol. 2025 (2025), No. 121, pp. 1-20.

Existence of normalized solutions to Kirchhoff-Boussinesq equations in the subcritical and supercritical regime

Chunling Tao, Lintao Liu, Kaimin Teng

Abstract:
In this article we study the existence of normalized solutions to the Kirchhoff-Boussinesq equation under the mass constraint \(\|u\|_{2}=c\). In the \(L^{2}\)-subcritical regime, we apply Ekeland's variational principle and concentration compactness method to minimize the energy functional on the mass-constrained manifold. In the \(L^{2}\)-supercritical regime, we introduce a Pohozaev-constrained minimization approach, combined with scaling arguments to recover compactness. To handle the additional difficulties posed by \(q\)-Laplacian, we treat distinct ranges of \(q\) separately.

Submitted June 24, 2025. Published December 29. 2025.
Math Subject Classifications: 35J35, 35J92, 35J20.
Key Words: Normalized solutions; biharmonic equations; \(q\)-Laplacian; Kirchhoff-Boussinesq equation.
DOI: 10.58997/ejde.2025.121

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Chunling Tao
Department of Mathematics
Taiyuan University of Technology
Taiyuan 030024, Shanxi, China
email: taochunling2024@163.com
Lintao Liu
Department of Mathematics
North University of China
Taiyuan 030051, Shanxi, China
email: liulintao_math@nuc.edu.cn
Kaimin Teng
Department of Mathematics
Taiyuan University of Technology
Taiyuan 030024, Shanxi, China
email: tengkaimin2013@163.com

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