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Liouville-type theorem for a nonlinear sub-elliptic system involving \(\Delta _\lambda \)-Laplacian and advection terms

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Abstract

In this paper, we are concerned with the following system:

$$\begin{aligned} {\left\{ \begin{array}{ll}-w\Delta _\lambda u-\nabla _\lambda w.\nabla _\lambda u=\rho v^p\\ -w\Delta _\lambda v-\nabla _\lambda w.\nabla _\lambda v=\rho u^q\end{array}\right. } \text{ in } {\mathbb {R}}^N, \end{aligned}$$

where \(w,\rho \) are nonnegative continuous functions satisfying some growth conditions at infinity and \(p,q>1\). Here, \(\Delta _\lambda \) is the sub-elliptic operator introduced in [A.E. Kogoj and E. Lanconelli. Nonlinear Anal. 2012;75(12): 4637–4649] and is of the form

$$\begin{aligned} \Delta _\lambda =\sum _{i=1}^{N}\partial _{x_i}(\lambda _i^2 \partial _{x_i}). \end{aligned}$$

Our purpose is to establish a Liouville-type theorem for the class of positive stable solutions of the system. On one hand, our result generalizes the result in Duong and Nguyen (Electron J Differ Equ Paper No. 108, 11 pp, 2017) from the equation to the system, and on the other hand, it extends that of Hu (NoDEA Nonlinear Differ Equ Appl 25(1):7, 2018) to the sub-elliptic case.

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Duong, A.T., Quyet, D.T. & Van Biet, N. Liouville-type theorem for a nonlinear sub-elliptic system involving \(\Delta _\lambda \)-Laplacian and advection terms. J. Fixed Point Theory Appl. 25, 52 (2023). https://doi.org/10.1007/s11784-023-01057-9

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