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Mathematics  2014 

Asymptotic symmetries for fractional operators

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Abstract:

In this paper, we study equations driven by a non-local integrodifferential operator $\mathcal{L}_K$ with homogeneous Dirichlet boundary conditions. More precisely, we study the problem \[ \begin{aligned} &- \mathcal{L}_K u + V(x)u = |u|^{p-2}u, &&\text{in } \Omega, \newline &u=0, &&\text{in } \mathbb{R}^N \setminus \Omega, \end{aligned} \] where $2 < p < 2^{*}_s = \frac{2N}{N-2s}$, $\Omega$ is an open bounded domain in $\mathbb{R}^{N}$ for $N\ge 2$ and $V$ is a $L^\infty$ potential such that $-\mathcal{L}_K + V$ is positive definite. As a particular case, we study the problem \[ \begin{aligned} &(- \Delta)^s u + V(x)u = |u|^{p-2}u, &&\text{in } \Omega, \newline &u=0, &&\text{in } \mathbb{R}^N \setminus \Omega, \end{aligned} \] where $(-\Delta)^s$ denotes the fractional Laplacian (with $0

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