Existence and Multiplicity of Solutions for a Biharmonic Kirchhoff Equation in R5.

We consider the biharmonic equation Δ²u-(a + b R _R5 |Δu|²dx) Δu + V (x)u = f(u), where V (x) and f(u) are continuous functions. By using a perturbation approach and the symmetric mountain pass theorem, the existence and multiplicity of solutions for this equation are obtained, and the power-type case f(u) = |u|p-2u is extended to p (2, 10), where it was assumed p (4, 10) in many papers. [ABSTRACT FROM AUTHOR]