{ "id": "1510.03803", "version": "v1", "published": "2015-10-13T18:06:34.000Z", "updated": "2015-10-13T18:06:34.000Z", "title": "Semilinear elliptic equations with Hardy potential and subcritical source term", "authors": [ "Phuoc-Tai Nguyen" ], "comment": "26 pages", "categories": [ "math.AP" ], "abstract": "Let $\\Omega$ be a smooth bounded domain in $\\mathbb{R}^N$ and $\\delta(x)=\\text{dist}\\,(x,\\partial \\Omega)$. Assume $\\mu>0$, $\\nu$ is a nonnegative finite measure on $\\partial \\Omega$ and $g \\in C(\\Omega \\times \\mathbb{R}_+)$. We study positive solutions of $$ (P)\\qquad -\\Delta u - \\frac{\\mu}{\\delta^2} u = g(x,u) \\text{ in } \\Omega, \\qquad \\text{tr}^*(u)=\\nu. $$ Here $\\text{tr}^*(u)$ denotes the \\textit{normalized boundary trace} of $u$ which was recently introduced by M. Marcus and P. T. Nguyen. We focus on the case $0<\\mu < C_H(\\Omega)$ (the Hardy constant for $\\Omega$) and provide some qualitative properties of solutions of (P). When $g(x,u)=u^q$ with $q>1$, we prove that there is a critical value $q^*$ (depending only on $N$, $\\mu$) for (P) in the sense that if $1