Asymptotic behavior of positive solutions of semilinear elliptic problems with increasing powers

Abstract

We prove existence results of two solutions of the problem \[ \begin{cases} L(u)+u^{m-1}=λu^{p-1} & \text{ in $\Omega$}, \\ \quad u>0 &\text{ in $\Omega$}, \\ \quad u=0 & \text{ on $\partial \Omega$}, \end{cases} \] where $L(v)=-\mathrm{div}(M(x)\nabla v)$ is a linear operator, $p\in (2,2^{\ast }]$ and $\lambda$ and $m$ sufficiently large. Then their asymptotical limit as $m\to +\infty$ is investigated showing different behaviors.

arXiv comment18 pages