Nodal ground state solution to a biharmonic equation via dual method

Claudianor O. Alves, Alânnio B. Nóbrega

Using dual method we establish the existence of nodal ground state solution for the following class of problems $$ \left\{ \begin{array}{l} Δ^2 u = f(u), \quad \mbox{in} \quad Ω, \…