Codice QDD 45 Titolo Variational methods for nonlinear Steklov eigenvalue problems with an indefinite weight function Data 2009-07-10 Autore/i Pagani, C.D. ; Pierotti, D. Link Download full text Abstract We consider the problem of finding a harmonic function $u$ in a bounded domain $ om subset R^n$, $n ge 2$, satisfying a nonlinear boundary condition of the form $ partial_{ nu}u(x)= lambda mu(x)h(u(x))$, $x in partial om$ where $ mu$ changes sign and $h$ is an increasing function with superlinear, subcritical growth at infinity. We study the solvability of the problem depending on the parameter $ lambda$ by using min-max methods.