Ambrosetti-Prodi problem with degenerate potential and Neumann boundary condition

Autor: Dusan D. Repovs
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: Electronic Journal of Differential Equations, Vol 2018, Iss 41,, Pp 1-10 (2018)
Druh dokumentu: article
ISSN: 1072-6691
Popis: We study the degenerate elliptic equation $$ -\hbox{div}(|x|^\alpha\nabla u) =f(u)+t\phi(x)+h(x) $$ in a bounded open set $\Omega$ with homogeneous Neumann boundary condition, where $\alpha\in(0,2)$ and f has a linear growth. The main result establishes the existence of real numbers $t_*$ and $t^*$ such that the problem has at least two solutions if $t\leq t_*$, there is at least one solution if $t_*t^*$. The proof combines a priori estimates with topological degree arguments.
Databáze: Directory of Open Access Journals