Existence of multi-bump solutions to biharmonic operator with critical exponential growth in ${\mathbb{R}}^4$

Alânnio B. Nóbrega, Denilson S. Pereira

Using variational methods, we establish existence of multi-bump solutions for the following class of problems $$ \left\{ \begin{array}{l} Δ^2 u +(λV(x)+1)u = f(u), \quad \mbox{in}…