On blow-up conditions for solutions of differential inequalities with $φ$-Laplacian

Abstract

Let $Ω\ne \emptyset$ be an unbounded open subset of ${\mathbb R}^n$, $n \ge 2$. We obtain blow-up conditions for non-negative solutions of the problem $$ {\mathcal L}_φu \ge F (x, u) \quad \mbox{in } Ω, \quad \left. u \right|_{ \partial Ω } = 0, $$ where $φ$ and $F$ are some function and $$ {\mathcal L}_φu = \operatorname{div} \left( \frac{ φ(|\nabla u|) }{ |\nabla u| } \nabla u \right) $$ is the $φ$-Laplace operator.