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Qualitative properties of solutions for system involving the fractional Laplacian

Part of: Partial differential equations Miscellaneous topics - Partial differential equations Elliptic equations and systems

Published online by Cambridge University Press:  26 February 2024

Ran Zhuo  and
Yingshu Lü
Ran Zhuo
Affiliation:
Department of Mathematics, Shanghai Normal University, Shanghai 200234, People's Republic of China (zhuoran1986@126.com)
Yingshu Lü
Affiliation:
Institute of Natural Sciences, CMA-Shanghai, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China (yingshulv@sjtu.edu.cn)
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Abstract

In this paper, we consider the following non-linear system involving the fractional Laplacian0.1

\begin{equation} \left\{\begin{array}{@{}ll} (-\Delta)^{s} u (x)= f(u,\,v), \\ (-\Delta)^{s} v (x)= g(u,\,v), \end{array} \right. \end{equation}
in two different types of domains, one is bounded, and the other is an infinite cylinder, where $0< s<1$. We employ the direct sliding method for fractional Laplacian, different from the conventional extension and moving planes methods, to derive the monotonicity of solutions for (0.1) in $x_n$ variable. Meanwhile, we develop a new iteration method for systems in the proofs. Hopefully, the iteration method can also be applied to solve other problems.

Keywords

fractional Laplaciannarrow region principlesliding methodmonotonicity

MSC classification

Primary: 35B50: Maximum principles
Secondary: 35J60: Nonlinear elliptic equations 35R11: Fractional partial differential equations

Information

Type
Research Article
Information
Proceedings of the Royal Society of Edinburgh Section A: Mathematics , Volume 155 , Issue 5 , October 2025 , pp. 1661 - 1676
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Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of The Royal Society of Edinburgh

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