The Gelfand problem for the Infinity Laplacian

Abstract

We study the asymptotic behavior as $p\to\infty$ of the Gelfand problem \[ -\Delta_{p} u=\lambda\,e^{u}\ \textrm{in}\ \Omega\subset\mathbb{R}^n,\quad u=0 \ \textrm{on}\ \partial\Omega. \] Under an appropriate rescaling on $u$ and $\lambda$, we prove uniform convergence of solutions of the Gelfand problem to solutions of \[ \min\left\{|\nabla{}u|-\Lambda\,e^{u}, -\Delta_{\infty}u\right\}=0\ \textrm{in}\ \Omega,\quad u=0\ \text{on}\ \partial\Omega. \] We discuss existence, non-existence, and multiplicity of solutions of the limit problem in terms of $\Lambda$.