Asymptotic analysis of positive solutions for a polyharmonic problem outside the unit ball


Z. Ben Yahia, Z. Zine El Abidine




This paper deals with the existence and asymptotic analysis of positive continuous solutions for the following nonlinear polyharmonic boundary value problem: \begin{align*} \begin{cases} (-\Delta)^{m}u= b(x)u^{p}, ext{in} D, & imimits_{|x| \rightarrow 1 } \big(|x|^{2}-1\big)^{1-m} u(x) =0, imimits_{|x| \rightarrow ıfty } (|x|^{2}-1\big)^{1-m} u(x) = 0. \end{cases} \end{align*} Here $m$ is an integer greater than 2, $p \in(-1,1)$, $ D$ is the complementary of the closed unit ball of $\mathbb{R}^{n} $ with $n >2m$, and the function $b$ is nonnegative and continuous on $D$, satisfying some appropriate assumptions related to Karamata regular variation theory.