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STABLE SOLUTIONS TO THE STATIC CHOQUARD EQUATION

Part of: Equations of mathematical physics and other areas of application Partial differential equations Elliptic equations and systems

Published online by Cambridge University Press:  10 June 2020

PHUONG LE
PHUONG LE*
Affiliation:
Division of Computational Mathematics and Engineering, Institute for Computational Science, Ton Duc Thang University, Ho Chi Minh City, Vietnam Faculty of Mathematics and Statistics, Ton Duc Thang University, Ho Chi Minh City, Vietnam email lephuong@tdtu.edu.vn
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Abstract

This paper is concerned with the static Choquard equation

$$\begin{eqnarray}-\unicode[STIX]{x1D6E5}u=\bigg(\frac{1}{|x|^{N-\unicode[STIX]{x1D6FC}}}\ast |u|^{p}\bigg)|u|^{p-2}u\quad \text{in }\mathbb{R}^{N},\end{eqnarray}$$
where $N,p>2$ and $\max \{0,N-4\}<\unicode[STIX]{x1D6FC}<N$. We prove that if $u\in C^{1}(\mathbb{R}^{N})$ is a stable weak solution of the equation, then $u\equiv 0$. This phenomenon is quite different from that of the local Lane–Emden equation, where such a result only holds for low exponents in high dimensions. Our result is the first Liouville theorem for Choquard-type equations with supercritical exponents and $\unicode[STIX]{x1D6FC}\neq 2$.

Keywords

Choquard equationstable solutionLiouville theoremsupercritical exponent

MSC classification

Primary: 35J61: Semilinear elliptic equations
Secondary: 35B35: Stability 35B53: Liouville theorems, Phragmén-Lindelöf theorems 35Q40: PDEs in connection with quantum mechanics
Type
Research Article
Information
Bulletin of the Australian Mathematical Society , Volume 102 , Issue 3 , December 2020 , pp. 471 - 478
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Copyright
© 2020 Australian Mathematical Publishing Association Inc.

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