Eigenvalues for a combination between local and nonlocal $p-$Laplacians

Abstract

In this paper we study the Dirichlet eigenvalue problem $$ -\Delta_p u-\Delta_{J,p}u =\lambda|u|^{p-2}u \quad \text{ in } \Omega,\quad u=0 \quad\text{ in } \Omega^c=\mathbb{R}^N\setminus\Omega. $$ Here $\Delta_p u$ is the standard local $p-$Laplacian, $\Delta_{J,p}u$ is a nonlocal, $p-$homogeneous operator of order zero and $\Omega$ is a bounded domain in $\mathbb{R}^N$. We show that the first eigenvalue (that is isolated and simple) satisfies $(\lambda_1)^{1/p}\to \Lambda$ as $p\to\infty$ where $\Lambda$ can be characterized in terms of the geometry of $\Omega$. We also find that the eigenfunctions converge, $u_\infty=\lim_{p\to\infty} u_p$, and find the limit problem that is satisfied in the limit.