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Existence, non-existence and degeneracy of limit solutions to $p-$Laplace problems involving Hardy potentials as $p\to1^+$ (2401.15406v1)

Published 27 Jan 2024 in math.AP

Abstract: In this paper we analyze the asymptotic behaviour as $p\to 1+$ of solutions $u_p$ to $$ \left{ \begin{array}{rclr} -\Delta_p u_p&=&\frac{\lambda}{|x|p}|u_p|{p-2}u_p+f&\quad \mbox{ in } \Omega,\ u_p&=&0 &\quad \mbox{ on }\partial\Omega, \end{array}\right. $$ where $\Omega$ is a bounded open subset of $\mathbb{R}N$ with Lipschitz boundary, $\lambda\in\mathbb{R}+$, and $f$ is a nonnegative datum in $L{N,\infty}(\Omega)$. Under sharp smallness assumptions on the data $\lambda$ and $f$ we prove that $u_p$ converges to a suitable solution to the homogeneous Dirichlet problem $$\left{ \begin{array}{rclr}- \Delta_{1} u &=& \frac{\lambda}{|x|}{\rm Sgn}(u)+f & \text{in}\, \Omega,\ u&=&0 & \text{on}\ \partial \Omega,\end{array}\right. $$ where $\Delta_{1} u ={\rm div}\left(\frac{D u}{|Du|}\right)$ is the $1$-Laplace operator. The main assumptions are further discussed through explicit examples in order to show their optimality.

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